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1Author    T. J. BastowRequires cookie*
 Title    47,49jj NMR in Metals, Inorganics, and Gels  
 Abstract    Some recent progress in solid state 47,49 Ti NMR is described and reviewed. The metallic-state work described covers metals such as hep titanium, TiB 2 , a number of intermetallics such as TiAl 2 and TiAl 3 . The inorganic work covers the various titanium oxide based materials including the Ti0 2 polymorphs, anatase, rutile and brookite. The gel work covers the evolution of crystalline titania from gels formed by hydrolysis of titanium isopropoxide. Some complementary data from 17 0 and 13 C NMR and powder X-ray diffraction is also included. 
  Reference    Z. Naturforsch. 55a, 291—297 (2000); received September 11 1999 
  Published    2000 
  Keywords    Titanium, NMR, Metals, Oxides, Gels 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0291.pdf 
 Identifier    ZNA-2000-55a-0291 
 Volume    55 
2Author    Giorgio Concas, Francesco Congiu, Giorgio Spano, Marco Bettinelli3, Adolfo Speghini3, ColinD. FlintbRequires cookie*
 Title    Investigation of Structural Questions on Europium Compounds by Means o f 151 Eu Mössbauer Spectroscopy  
 Abstract    151 Eu Mössbauer spectroscopy permits the determination of the symmetry of the site in which Eu is accommodated. It has been shown that the 151Sm F3 source can be considered a monochromatic source. This source was used to measure the line width of Eu3+ in a site with cubic symmetry, i. e. in a Cs2NaEuCl6 crystal. The isomer shift of commercial compounds used as standards (anhydrous EuF3 and EuS) was also measured. In the case of Cs2N aE u(N 02)6 hexanitritoelpasolite the trivalent europium ion is accommodated in a site with perfect cubic symmetry. In E u(P 03)3 crystalline metaphosphate, the rare earth is located in a site which appears to be distorted with respect to cubic symmetry; this site has no threefold or fourfold symmetry axis. 
  Reference    Z. Naturforsch. 56a, 789—793 (2001); received October 29 2001 
  Published    2001 
  Keywords    Elpasolites, Oxides, 15lEu Mössbauer Spectroscopy 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0789.pdf 
 Identifier    ZNA-2001-56a-0789 
 Volume    56 
3Author    HansH. KarschRequires cookie*
 Title    Funktionelle Trimethylphosphinderivate, VIII [1] Phosphoniumsalze, Oxide und Sulfide von Tetraorganodiphosphinomethanen, R2PCH2P(CH3)2  
 Abstract    Tetramethyldiphosphinomethane (CH3)2PCH2(CH3)2 (la) reacts with HCl/ether to form the mono-and bisquaternary salts [(CH3)2PCH2P(H)(CH3)2]C1 (2) and [(CH3)2(H)PCH2P(H)(CH3)2]Cl2 (3), respectively. The system 1 a/HCl, incorporating 1 a/2/3, represents a useful tool for studying the appearance of XnAA'X'n-spin type systems. These compounds are also prototypes for a variety of other mono-or bis-phosphonium salts, which are formed in the reactions of the diphosphines (CH3)2PCH2PR2 (R — CH3, *-C4H9, C6H5) (la-c) with (CH3)2C0 + HC1, CH3I, *-C4H9Br, C6H5C0C1, (CH3)2PC1 and Br(CH2)nBr (n = 1, 2). Heterocycles are not obtained. The dioxide 14 and the disulfide 15 are also described. Some properties and spectroscopic data (IR, 1 H, 31 P and 13 C NMR) of 26 new compounds are reported and briefly discussed. 
  Reference    (Z. Naturforsch. 34b, 31—43 [1979]; eingegangen am 8. September 1978) 
  Published    1979 
  Keywords    Phosphonium Salts, Oxides, Sulfides, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0031.pdf 
 Identifier    ZNB-1979-34b-0031 
 Volume    34 
4Author    U. Lehmann, Hk Müller-BuschbaumRequires cookie*
 Title    The Structure of Nd2Ni04 and its Relationship to La2Ni04 and La2CuC>4  
 Abstract    Single crystals of Nd2Ni04 were prepared by plasma and C02-LASER technique and analysed by X-ray single crystal methods. Nd2Ni04 is the first compound of the orthorhombically dis-torted La2Cu04-type. 
  Reference    Z. Naturforsch. 35b, 389—390 (1980); eingegangen am 19. Dezember 1979 
  Published    1980 
  Keywords    Neodymium, Nickel, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0389_n.pdf 
 Identifier    ZNB-1980-35b-0389_n 
 Volume    35 
5Author    A.-R Schulze, U. Hk, Müller-BuschbaumRequires cookie*
 Title    Oxogallates of Alkaline Earth Metals, IX The Structure of ß-SrGa204  
 Abstract    /?-SrGa204 was prepared and investigated by X-ray single crystal methods. It crystallizes with monoclinic symmetry: C2j>-P2i/c, a — 839.2; b = 901.8; c = 1069.7 pm; ß = 93.9°, Z — 8. The orientation of the tetrahedra is discussed in comparison with other well-known members of the stuffed tridymite structure. 
  Reference    Z. Naturforsch. 36b, 892—893 (1981); eingegangen am 27. März 1981 
  Published    1981 
  Keywords    Crystal Structure, Strontium, Gallium, Oxide 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0892_n.pdf 
 Identifier    ZNB-1981-36b-0892_n 
 Volume    36 
6Author    Holger Szillat, Hanskarl Müller-BuschbaumRequires cookie*
 Title    Synthesis and Crystal Structure of Cuq^sH oj 25w 2o 8  
 Abstract    Single crystals of Cu(l.2sHO|.2sW20 8 were prepared by recrystallization from melts and investigated by X-ray diffractometer technique. Cuo^sHoj 25W 2Os crystallizes with m ono­ clinic symmetry, space group C2/c, o -19.123, b -5.613, c = 11.479 Ä , ß = 111.44°. Z = 8. It represents a new structure type characterized by W40 18 groups and Cu+/H o3+ at one point position in statistical distribution. Cu+/H o3+ show an octahedral coordination. A nother point position is occupied by Ho3+ with C. N. = 7. 
  Reference    Z. Naturforsch. 49b, 1145—1149 (1994); eingegangen am 25. März 1994 
  Published    1994 
  Keywords    Crystal Structure Copper Holmium, Tungsten, Oxide 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1145.pdf 
 Identifier    ZNB-1994-49b-1145 
 Volume    49 
7Author    H., M. Üller-Buschbaum, L. WalzRequires cookie*
 Title    Einkristallröntgenstrukturanalyse an Quecksilberchromat(VI)  
 Abstract    g 3 0 2 C r 0 4 Single C rystal X -Ray S tructure D eterm ination of a M ercury C hrom ate(V I): H g30 2C r 0 4 Th. H an sen , H k. Single crystals of Hg3C r0 6 have been prepared by high pressure techniques (3600 bar oxygen, 600 °C). Hg3C r06 crystallizes with trigonal symmetry, space group D |-P 3 212, a = 7.137(1), c = 10.017(2)Ä, Z -3. Nearly linear O -H g -O dumb-bells are connected in planes, forming strongly puckered nets of six-membered rings. Each Hg60 6 ring is centered by a C r04 tetrahedron; the C r04 tetrahedra are arranged in two equally occupied split positions. 
  Reference    (Z. Naturforsch. 50b, 47—5 [1995]; eingegangen am 2. August 1994) 
  Published    1995 
  Keywords    Mercury, Chromium, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0047.pdf 
 Identifier    ZNB-1995-50b-0047 
 Volume    50 
8Author    Ch LangRequires cookie*
 Title      
 Abstract    Single crystals of LiBa2Cu30 6 have been pre­ pared by recrystallization from melts in a stream of dry Argon as well as by spontaneous CO 2-LASER heating. It crystallizes with orthorhom bic symmetry, space group -Fmmm, a = 8,219(2), b = 11,520 (2), c = 14,284(3) A, Z = 8. The crystal structure is isotypic to NaBa2Cu30 6. 
  Reference    Z. Naturforsch. 50b, 681—683 (1995); eingegangen am 19. September 1994 
  Published    1995 
  Keywords    Lithium, Barium, Copper, Oxide 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0681_n.pdf 
 Identifier    ZNB-1995-50b-0681_n 
 Volume    50 
9Author    E. Peters, Hk Müller-BuschbaumRequires cookie*
 Title    Ein Titan-Tantaloxid mit Ti11: Ti0 ,3 3 Ta0 ,6 7O2 (TiTa20 6)  
 Abstract    Black single crystals o f Tio^Tao 670 2 have been prepared by C 0 2-LA SER techniques heating a mixture of TiO and Ta20 5 to T > 2000 °C. The titanium tantalum oxide crystallizes with tetragonaj symmetry, space group D 4 h -P 4 2/mnm, lattice constants a = 4.7344(6) A, c = 3.0504(2) A , Z = 2. Ti().33Ta0.67O 2 represents the compound TiTa20 6 with rutile structure because of the statistical distribution of Ti2+ and Ta5+. The composition of rutile-type com ­ pounds is discussed in more general terms. 
  Reference    Z. Naturforsch. 50b, 1167—1170 (1995); eingegangen am 16. Januar 1995 
  Published    1995 
  Keywords    Titanium, Tantalum, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1167.pdf 
 Identifier    ZNB-1995-50b-1167 
 Volume    50 
10Author    D. Frerichs, C. H. Park, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kenntnis der Tief-und Hochtemperaturform eines Oxidarsenats des Zinks: Zn0Z n3(A s0 4)2 On the Low and High Temperature Form o f an Oxidearsenate of Zinc: Z n 0 Z n 3( A s 0 4)2  
 Abstract    Single crystals of the low (t-) and high (h-) temperature form o f Z n 0 Z n 3(A s 0 4)2 have been prepared by flux and by C 0 2-L A SER techniques respectively. Both compounds crystal­ lizes monoclinic, space group C2h-P2;/n with the lattice parameters t-Z n 0 Z n 3(A s 0 4)2: a = 9.807(3), b = 8.180(2), c = 9.967(2) A , ß = 116.53(2)°, Z = 4 and h -Z n 0 Z n 3(A s 0 4)2: a = 9.743(3), b = 8.163(8), c = 17.933(2) A , ß = 91.55(2)°, Z = 8. Similarities and differences of the crystal structures will be discussed. 
  Reference    Z. Naturforsch. 51b, 233 (1996); eingegangen am 10. Juli 1995 
  Published    1996 
  Keywords    Zinc, Arsenic, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0233.pdf 
 Identifier    ZNB-1996-51b-0233 
 Volume    51 
11Author    D. Frerichs, C. H. Park, HkM. Üller-B, UschbaumRequires cookie*
 Title    Zur Kenntnis zweier Formen des Zinkorthoarsenates: a-Z n 3(A s04)2 und /3-Zn3(A s0 4)2 On Two Forms o f Zinc O rthoarsenate: a -Z n 3(A s 0 4)2 and /3-Zn3(A s 0 4)2  
 Abstract    Single crystals of two forms of zinc orthoarsenate (a-Z n3(A s04)2 (I) and /3-Zn3(A s04)2 (II)) have been prepared by flux techniques. Both compounds crystallize monoclinically, space groups (I): Cih-P2l/c, (II): Cih-P21/n, with the lattice parameters (I): a = 6.306(2), b = 8.652(2), c = 'ol 1.321(4) A, ß = 92.25(5) °, Z = 4 and (II): a = 5.281(1), b = 8.494(2), c = 7.726(3) A, ß = 96.39(3)°, Z = 2. ct-Zn3(A s04)2 is isotypic to I-Cu3(A s04)2 and ß-Zn3(A s04)2 to 7-Zn3(P 0 4)2. Similarities and differences of the crystal structures are discussed. 
  Reference    Z. Naturforsch. 51b, 333—337 (1996); eingegangen am 31. August 1995 
  Published    1996 
  Keywords    Zinc, Arsenic, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0333.pdf 
 Identifier    ZNB-1996-51b-0333 
 Volume    51 
12Author    J. Feldmann, Hk Müller-BuschbaumRequires cookie*
 Title    Kristallstrukturuntersuchung am Barium-Yanadyl-Vanadat: Ba2(V 0)V 20 8 Crystal Structure Investigation of the Barium Vanadyl-Vanadate: Ba2(V 0 )V 20 8  
 Abstract    Single crystals of Ba2(V 0)V 20 8 have been prepared by solid state reactions of Ba2V 20 7, V 9O 1 and V ^ 05 in sealed silica tubes. This compound crystallizes with monoclinic symmetry, space group C 1 -P 2 ,, a = 8.1174(9), b = 5.9699(9), c = 9.2903(9) A , ß = 113.94(1)°, Z = 2. V 5+ shows tetrahedral coordination. V 4+ inside ^ [V (3)0 4] chains is characterized by a square pyramidal coordination with a short apical V-O distance of 1.6 A typically for vanadyl groups. Ba2(V 0)V 20 8 represents a new structure type and is not isotypic to Sr2(V 0)V 20 8. 
  Reference    Z. Naturforsch. 51b, 489—4 (1996); eingegangen am 22. August 1995 
  Published    1996 
  Keywords    Barium, Vanadium, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0489.pdf 
 Identifier    ZNB-1996-51b-0489 
 Volume    51 
13Author    O. Wegener3, R. K. Üchler3, A. W. AtterichbRequires cookie*
 Title      
 Abstract    12STe nuclear spin relaxation (NSR) and electrical conductivity measurements were performed on ultrapure single-crystalline paratellurite (a -T e0 2) between about 50 K and the melting point (1007 K) at various oxygen partial pressures (1 b a r -10"4 bar). At elevated temperatures the NSR rate l / 7 \ and conductivity a are caused by the diffusive motion o f point defects. From the observed p02-dependence of 1/Ti and a a defect model is developed which is shown to be consistent with the experimental data. The m odel involves ionic oxygen interstitials (O"), doubly charged oxygen vacancies (Vo') and charge-com pensating electron holes (h'). The observed pressure dependence suggests that the N SR rate is induced by the m otion of \ q while the conductivity is due to the m obility o f h*. Evaluation o f the data leads to 3.3 eV for the incorporation enthalpy o f oxygen on interstitial sites and to 4.5 eV for the formation enthalpy of oxygen Frenkel pairs (O "-V q'). Further, the chemical diffusion coefficient Dc is found to be caused by the ambipolar diffusion o f OS' and h \ At 950 K we obtained from both the NSR and conductivity experiments D c = (1 ± 0.3) • 10" 5 cm 2/s. 
  Reference    Z. Naturforsch. 49a, 1151 (1994); received August 22 1994 
  Published    1994 
  Keywords    Oxides, Point defects, Diffusion, N M R, Conductivity 
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 TEI-XML for    default:Reihe_A/49/ZNA-1994-49a-1151.pdf 
 Identifier    ZNA-1994-49a-1151 
 Volume    49 
14Author    C. Bessada, V. Lacassagne, D. Massiot, P. Florian, J.-P Coutures, E. Robert, B. GilbertRequires cookie*
 Title    Structural and Dynamic Approaches of Molten Salts by High Temperature Spectroscopies  
 Abstract    The combination of 27 AI NMR expriments and Molecular Dynamics simulation confirms the exis-tence of penta-coordinated Aluminium in several molten aluminium oxides. In the case of fluoroalumi-nate molten salts, NMR and Raman spectroscopies provide complementary approaches leading to a structural description in term of AIF4, AlF 2-and AlF^f species. 
  Reference    Z. Naturforsch. 54a, 162—166 (1999); received November 27 1998 
  Published    1999 
  Keywords    27 A1 High Temperature NMR, Oxides, NaF-AlF 3 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0162.pdf 
 Identifier    ZNA-1999-54a-0162 
 Volume    54 
15Author    G. Concas, C. Muntoni, G. Spano, M. Bettinelli3, A. Speghini3Requires cookie*
 Title    Mössbauer Investigation of Eu3+ Site Occupancy and Eu-O Covalency in Y20 3 and Gd20 3 Nanocrystals  
 Abstract    Samples of nanocrystalline Yj 8Euo.20 3 and G d18Euo20 3 were examined by 151Eu Mössbauer spectroscopy. The degree of covalency of the E u-0 bond has been studied. The spectrum of the cubic Yj gEuo 20 3 sample has been resolved into 2 contributions due to europium in the C3i and C2 sites, for the first time in 151Eu Mössbauer spectroscopy. The degree of covalency and the electric field gradient of the 2 sites has been compared. The occupancy, by the lanthanide ion, of the more and less symmetric sites in the cubic structure of Yj gEuo 20 3 has been investigated and discussed. 
  Reference    Z. Naturforsch. 56a, 267—272 (2001); received November 11 2000 
  Published    2001 
  Keywords    Europium, Yttrium, Oxides, Nanocrystals, 151Eu Mössbauer Spectroscopy 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0267.pdf 
 Identifier    ZNA-2001-56a-0267 
 Volume    56 
16Author    M. Schweizer, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Verbindungsbildung von MeO : M203, Teil III Zur Kenntnis von BeGa204 Compound Formation Me0:M203, Part III BeGa2C>4  
 Abstract    A new compound, BeGa204, was prepared by high temperature reaction between BeO and Ga203. X-ray single crystal investigations show a hitherto unknown structure type of M2+M23+04 compounds. BeGa204 crystallizes with hexagonal symmetry a = 775.0 and c = 298.0 pm, space group C£h-P63/m. Be 2+ and Ga 3+ are statistically distributed and are surrounded by 0 2--tetrahedra. 
  Reference    Z. Naturforsch. 34b, 1067—1069 (1979); eingegangen am 10. Mai 1979 
  Published    1979 
  Keywords    Beryllium, Gallium, Oxide, X-ray, Crystal Structure 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1067.pdf 
 Identifier    ZNB-1979-34b-1067 
 Volume    34 
17Author    J. Schmachtel, Hk Müller-BuschbaumRequires cookie*
 Title    Oxotitanate mit gemischter Valenz, III Zur Kenntnis von BaTi8016 Oxotitanates with Mixed Valence. III About BaTisOie  
 Abstract    The hitherto unknown compound BaTisOi6 was prepared by heating a mixture of Ba0:Ti02 = 1:4 in a vacuum furnace to 1400 °C (Ti crucible). Single crystal X-ray investigations show monoclinic symmetry (a — 1420,9, b = 297,1, c — 998,1 pm, ß = 133,50°; space group C|-C2). The crystal structure was found to be isotypic to a-Mn02. 
  Reference    Z. Naturforsch. 35b, 332—334 (1980); eingegangen am 14. Dezember 1979 
  Published    1980 
  Keywords    Barium, Titanium, Oxide, Crystal Structure, a-Mn02-Type 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0332.pdf 
 Identifier    ZNB-1980-35b-0332 
 Volume    35 
18Author    D. Chales De Beaulieu, Hk Müller-BuschbaumRequires cookie*
 Title    Gemischtvalente Oxovanadate, I Ein neuer Strukturtyp für die Verbindung BaV10O15 Oxovanadates with Mixed Valence, I A New Crystal Structure of BaVioOis  
 Abstract    BaVioOis was prepared by high temperature reaction of BaO and V2O3 in H2-atmosphere (T > 1800°). X-ray investigations of single crystals show a new structure type with octa-hedral coordination of V 3+ /V 2+ (statistical distribution) and cuboctahedral surrounding of Ba 2+ . Orthorhombic symmetry, space group D^|-Ccmb, a = 995,8; b = 1161,8; c = 941,0; Z = 4. 
  Reference    Z. Naturforsch. 35b, 669—671 (1980); eingegangen am 5. Februar 1980 
  Published    1980 
  Keywords    Barium, Vanadium, Oxide, Mixed Valence State, Crystal Structure 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0669.pdf 
 Identifier    ZNB-1980-35b-0669 
 Volume    35 
19Author    A.-R Schulze, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Verbindungsbildung von MeO :M203. V Neue metastabile Verbindungen: BaSr2Y6012, BaSr2Er6012 und BaSr2Tm6012  
 Abstract    The new metastable compounds BaSr2YeOi2 (I), BaSr2Er60i2 (II) and BaSr2Tm60i2 (III) could be prepared with high temperature reactions (C02-Laser). The X-ray single crystal investigations lead to hexagonal symmetry, space group Ch-P63/m; lattice constants: I: o= 1029.9 c = 340.9 pm II: a = 1027.7 c = 338.5 pm III: a = 1021.5 c = 337.6 pm The crystal structure the formation of the compounds and the range of stabüity are discussed. 
  Reference    Z. Naturforsch. 36b, 837—839 (1981); eingegangen am 27. März 1981 
  Published    1981 
  Keywords    Barium, Strontium, Rare Earth, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0837.pdf 
 Identifier    ZNB-1981-36b-0837 
 Volume    36 
20Author    Doris Bodenstein, Axel Brehm, PeterG. Jones, Einhard Schwarzmann, GeorgeM. SheldrickRequires cookie*
 Title    Darstellung und Kristallstruktur vom Arsen(III)arsen(V)oxidhydroxid As305(0H) Preparation and Crystal Structure of the Arsenic(III) Arsenic(V) Oxide Hydroxide As305(0H)  
 Abstract    The title compound was prepared by heating the hydrolysis products of AS2O4 in a sealed tube. The crystal structure was determined and refined to R = 0.058 [P2j./c, a = 1250.4(6), b = 459.3(2), c = 1097.6(6) pm, ß = 118.08(5)°, Z = 4]. The structure consists of infinite layers, containing pyramidal As(III)03 and tetrahedral As(V)04 groups, and stabilised by hydrogen bonding. 
  Reference    Z. Naturforsch. 37b, 138—140 (1982); eingegangen am 7. Oktober 1981 
  Published    1982 
  Keywords    Sealed-Tube Synthesis, Crystal Structure, Arsenic, Oxide 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0138.pdf 
 Identifier    ZNB-1982-37b-0138 
 Volume    37 
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