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1977 (337)
81Author    Requires cookie*
 Title    Crystal Structure of a Mesomeric Organo Tin Radical  
 Abstract    W o l f g a n g U b e r , H a r t m u t B. S t e g m a n n und K l a u s S c h e f f l e r Institut für Organische Chemie der U niversität Tübingen und J o a c h im S t r ä h l e X-ray, Stable Radicals o-Aminophenols react with organo tin compounds forming stable mesomeric com ­ plexes. The structure o f one compound was determined by X -ray crystallography. The tin atom is chelated by two oxygen and one nitrogen atom. The nitrogen atom and the associated C and Sn atoms are in a plane and therefore the ESR tin coupling constant has an additional contribution by a jr-<x-inter-action through the N -S n bond. 
  Reference    (Z. Naturforsch. 32b, 355—356 [1977]; eingegangen am 3. November 1976) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0355_n 
 Volume    32 
82Author    W.Requires cookie*
 Title    Preparation and Crystal Structure of Li2Sb  
  Reference    (Z. Naturforsch. 32b, 357—359 [1977]; eingegangen am 3. Dezember 1976) 
  Published    1977 
  Keywords    Lithium Antimonide, Intermetallic Compound, Crystal Structure 
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 Identifier    ZNB-1977-32b-0357_n 
 Volume    32 
83Author    Requires cookie*
 Title    C S IW  
 Abstract    R lab fjO H R 2 ab -O C " R 3 a,b 2. Die 6 . Zeile von Abschnitt 4 auf S. 1659 muß heißen: m/e 170 (5%, M+), 152 (100%, C8H 8OS), Ber. 152, Die Redaktion. 
  Reference    (Z. Naturforsch. 32b, 360 [1977]) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0360_e 
 Volume    32 
84Author    F.A SRequires cookie*
 Title    Beiträge zur Chemie von Molybdän und W olfram, XIX* Zur Lage der H-Atom e in MoC^Cla * H 20 Contributions to the Chemistry of Molybdenum and Tungsten, X IX * The Positions of H-Atoms in M o02C12 * H 20  
 Abstract    MAPLE Calculation, P olytype Crystal, Molybdenum B y calculating MAPLE, it can be discriminated between 2 alternatives o f the H positions of an 0 -H --C 1 bridging system . Application o f this result on a poly type crystal of this compound leads to further alternatives which are discussed. The existence of the poly type crystal cannot be explained by the H bridging system but only by the conditions during crystal growth. 
  Reference    (Z. Naturforsch. 32b, 361—364 [1977]; eingegangen am 12. Januar 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0361 
 Volume    32 
85Author    Requires cookie*
 Title    Beiträge zur Chemie von Molybdän und W olfram, XX* Verfeinerung der Kristallstruktur der roten Molybdänbronze -K 0 33M o03  
 Abstract    C ontribution to the Chemistry of Molybdenum and Tungsten, XX * Refinement of the Crystal Structure of the Red Molybdenum Bronce -KH) 33M o03 F. A. S c h r ö d e r und W. S c h u c k m a n n Crystal Structure, Bond Order, Molybdenum Bronce With new X -ray data from a crystal of stoichiometric K 0.33M0 O3 the crystal structure of this compound was refined until R (anisotropic) = 0.023. The characteristic distortion of the Mo-O octahedra is discussed. Von der roten Kaliummolybdänbronze wurden durch Schmelzelektrolyse von M0 O3 und K2M0 O4 bei 560 °C Einkristalle der Zusammensetzung K o,26M o03 von W o l d , K u m m a n n , A r n o t t und F e r e t t i 1 dargestellt. Diese Einkristalle wurden zur Röntgenstrukturanalyse von S t e p h e n s o n und W a d s l e y 2 verwendet, welche mit einem R-Wert von 0,134 beendet wurde. Aus der Struktur wurde die Formel Ko,33Mo0 3 — K4M012O36 bei vollständi­ ger Besetzung der 4-zähligen Punktlage mit K -Atomen gefordert. An Kristallen dieser Grenz -Zusammensetzung wurden elektrische Leitfähigkeit, magnetische Suszeptibilität, Hall-Spannung und thermoelektrische Daten von B o u c h a r d , P e r l s t e i n und S i e n k o 3 gemessen. Umfangreiche Messungen von E S R und magnetischer Suszeptibilität wurden ebenfalls an Einkristallen dieser Zusammensetzung kürzlich von B a n g und S p e r l i c h 4 durchgeführt. Weitere Details s. Lc. 5. Bei der systematischen Untersuchung der Mo-O-Bindungsabstands-/ Bindungsordnungsbeziehung durch S c h r ö d e r 6 fiel auf, daß die vorliegenden Bindungsabstände sehr unsystematische und z.T. irreguläre Werte zeigen. Daher wurde eine Neube­ stimmung bzw. Verfeinerung der Kristallstruktur mit einem neuen Datensatz durchgeführt. 
  Reference    (Z. Naturforsch. 32b, 365—368 [1977]; eingegangen am 12. Januar 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0365 
 Volume    32 
86Author    Requires cookie*
 Title    Mössbauer-spektroskopische Untersuchungen an Na2MnFeF7  
 Abstract    Mössbauer Spectroscopic Investigation of N a2M nFeF7 J . P e b l e r , K. S c h m i d t , D. B a b e l und W. V e r s c h a r e n In contrast to the Mössbauer spectrum of the orthorhombic compound Na2N iF eF 7 that of the manganous compound Na2MnFeF7 gives evidence of two different iron positions. This rules out Na^MnFeF? to be isostructural with N a2N iF eF 7 , which crystallizes like most compounds Na2MHMin F 7 in the weberite structure, the M111 ions occupying only one site in space group Im m 2-C |°. The Mössbauer data evaluated for the two iron sites (Fe 1 /Fe 2 respectively) in Na2MnFeF7 are: 0 = 0/90°, cp = undetermined/700, rj — 0.6 both, H = 551/541 kOe, Vzz = + 2 .7 • 1018 Vcm-2 both. NaMnFeF7 is antiferromagnetic with a Neel temperature of Tn — 94 K for both iron positions. 
  Reference    (Z. Naturforsch. 32b, 369—372 [1977]; eingegangen am 27. Dezember 1976) 
  Published    1977 
  Keywords    Mössbauer Spectra, Internal Field, Field Gradient 
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 Identifier    ZNB-1977-32b-0369 
 Volume    32 
87Author    Requires cookie*
 Title    Zur Kenntnis des Argyrodit-Strukturtyps: Die Kristallstruktur von A g8SiS6  
 Abstract    The Argyrodite Structure Type: The Crystal Structure of A g8SiS(B e r n t K r e b s u n d J ü r g e n M a n d t 
  Reference    (Z. Naturforsch. 32b, 373 [1977]) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0373 
 Volume    32 
88Author    Requires cookie*
 Title    Über Oxocuprate, XXII Zur Kristallchemie von Kupferoxichlorid: Cu2OCl2 On Oxocuprates, X X II  
 Abstract    The Crystal Structure of Cu20Cl2 R. A r p e und H k. M ü lle r -B u s c h b a u m Copper Oxide Chloride, X-ray Single crystals of Cu2 OCl2 were prepared and investigated by X -r a y methods. Cu2 OCl2 crystallizes orthorhom bic, space group D ^ -F d d d (« = 969.9, 6 = 960.3, c = 746.2 pm). Cu2+ has a distorted octahedral coordination. The JAHN-TELLER-Effect and effective coordination number are discussed. 
  Reference    (Z. Naturforsch. 32b, 380—382 [1977]; eingegangen am 17. Januar 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0380 
 Volume    32 
89Author    Requires cookie*
 Title      
 Abstract    G e r h a r d C o r d i e r u n d H e r b e r t S c h ä f e r BaMnSb2, SrMnBi2 and BaMnBi2 have been prepared and structurally characterized. The new compounds are isotypic and crystallize tetragonal in the SrZnBi2 structure with the following constants: BaMnSb2: a = 4.53 ± 0.01 A, c = 24.34 ± 0.03 A, c/a = 5.37. SrMnBi2: a = 4.58 ± 0.01 A , c = 23.13 ± 0.03 A, c/a = 5.05. BaMnBi2: a — 4.63 ± 0.02 A, c = 24.22 i 0.05 A, c/a = 5.23. The transition metal atoms form together with the semimetal atoms sheets of tetragonal pyramids separated by double layers of alkali earth atoms. In these double layers there are inserted Bi/Sb-square nets. 
  Reference    (Z. Naturforsch. 32b, 383—386 [1977]; eingegangen am 29. Dezember 1976) 
  Published    1977 
  Keywords    Intermetallic Compounds, Crystal Structure, Ternary Antimonides, Ternary Bismutides 
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 Identifier    ZNB-1977-32b-0383 
 Volume    32 
90Author    A.R KRequires cookie*
 Title    Die Molekül-und Kristallstruktur  
 Abstract    von Bis(diam inoglyoxim ato)kobalt(II)diam inoglyoxim , Co(C2H5N 40 2) 2 c2h 6n 4o 2 The Crystal and Molecular Structure of Bis(diaminoglyoximato)cobalt(II)diaminoglyoxim, Co(C2H 5N 40 2) 2 • C2H 6N 40 2 Ö . B e k a r o g l u u n d S . S a r i s a b a n X-ray, Structure Determination, Bis(diam inoglyoximato)cobalt(II)diaminoglyoxim The title compound has been synthesized and its structure determined by three-dimensional X-ray data. Das Cobaloxim Bis(diaminoglyoximato)kobalt-(Il)diaminoglyoxim, C o ^ H s ^ C ^ • C2H 6N 4O2 (1), wurde in wäßriger Lösung aus Diaminoglyoxim, C2H 6N402 (2), und Kobaltacetat, Co(CH3COO)2 • 4 H2O unter N2-Atmosphäre hergestellt1. Verbin­ dung 1 ist aus mehreren Punkten interessant. Einmal liegen unseres Wissens -im Gegensatz zu den Dime-thylglyoximato(DMG)-Komplexen -keine Röntgen-strukturuntersuchungen von Diaminoglyoximato-(DAG)-Komplexen vor; d.h. die Frage, wie der DAG-Ligand koordiniert, ist nicht eindeutig ge­ klärt. Es sind prinzipiell drei Möglichkeiten denk­ bar2, da der DAG-Ligand zwei verschiedenartige funktionelle Gruppen -die NH2-und die NOH-Gruppe -besitzt. Unter Berücksichtigung der Strukturdaten von DMG-Metallkomplexen 3 ist eine Bindung über das Sauerstoffatom der Oximgruppe wenig wahrscheinlich. Die von uns durchgeführte Röntgenstrukturanalyse an 1 hat ergeben, daß der Chelatligand über die Stickstofifatome der beiden Oximgruppen an das Kobalt gebunden ist. Von weiterem Interesse ist die Struktur des 
  Reference    (Z. Naturforsch. 32b, 387—392 [1977]; eingegangen am 28. Januar 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0387 
 Volume    32 
91Author    Klinikum Großhadern, MünchenRequires cookie*
 Title    Untersuchungen an biologisch wirksamen Ligandensystemen, X II1 Metallkomplexe des Maleinsäurehydrazids und ihre physiologische Wirkung auf Yoshida-Sarkom-Asciteszellen  
 Abstract    In vestigation s o f B iologically A ctiv e L igands, X I I 1 M etal C om plexes o f M aleic A cid H ydrazide and their P hysiologic A ction on Y oshida-Sarcom a A scites Cells H e i n z P. F r i t z u n d B e r n h a r d L i p p e r t K u r t P o s s i n g e r u n d R e i n e r H a r t e n s t e i n The preparation and characterization of metal complexes of maleic acid hydrazide is reported, including Ca, Mn, Fe, Co, Ni, Cu, Zn and Pt-complexes, as well as the action of maleic acid hydrazide and one Pt-complex on Yoshida-ascites-sarcoma. 
  Reference    (Z. Naturforsch. 32b, 393—400 [1977]; eingegangen am 20. Januar 1977) 
  Published    1977 
  Keywords    Maleic Acid Hydrazide, Physiological Activity, Metal Complexes, Yoshida-Sarcoma Ascites Cells 
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 Identifier    ZNB-1977-32b-0393 
 Volume    32 
92Author    Requires cookie*
 Title    Stabilisierung eines Thio-oxira-Anions durch Koordination an Platin(II)  
 Abstract    Stabilization of th e Thio-oxim e Anion by C oordination to P la tin u m (II) F r a n z G ö t z f r i e d u n d W o l f g a n g B e c k In stitu t für Anorganische Chemie der U n iversität M ünchen T hio-oxim ate Complexes, P la tin u m (ll) (Ph3P)2P t(C 2H 4) reacts w ith bis(fluoren-9-ylidenam ino)-disulfide (2) to give a stable fluorenonthio-oxim ato com plex (3). A ketim ido com plex (4) results from th e reaction o f 2 w ith P t(P P h 3)4. 
  Reference    (Z. Naturforsch. 32b, 401—402 [1977]; eingegangen am 17. Dezember 1976) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0401 
 Volume    32 
93Author    Requires cookie*
 Title    Darstellung von Heteropolymolybdaten in organischen Lösungsmitteln  
 Abstract    P rep aratio n of H eteropolym olybdates in O rganic Solvents J o a c h i m F u c h s u n d I r e n e B r ü d g a m In stitu t für Anorganische Chemie der Freien U n iversität B erlin 
  Reference    (Z. Naturforsch. 32b, 403 [1977]) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0403 
 Volume    32 
94Author    Requires cookie*
 Title    Gehinderte Ligandenbewegungen in Übergangsmetallkomplexen, XII1 Tricarbonyl-^6-N-carbäthoxyazepin-chrom (0)  
 Abstract    , -molybdän(O) und -wolfram(O) H indered L igand M otions in T ran sitio n M etal Complexes, X I I 1 T ricarbonyl-^6-N -carbethoxyazepine-chrom ium (0), -molybdemim(O) an d -tungsten(O) C o r n e l i u s G. K r e i t e r u n d S a i m Ö z k a r A norganisch-Chem isches In stitu t der T echnischen U niversität M ünchen N -C arbethoxyazepine M etal C om plexes, Synthesis, NM R Tricarbonyl-i?6-N -carbethoxyazepine-m etal(0) com plexes o f chromium, m olybdenum and tu n gsten are form ed, w hen triearbonyl-trisacetonitrile-chrom ium (O), tricarbonyl-diglym e-m olybdenum (O) and tricarbonyl-trisacetonitrile-tungsten(O), respectively, are treated w ith N -carb eth oxyazep in e. A ccording to the and 13C NM R spectra o f th e N -carbethoxyazepine m etal com plexes tw o different ligan d motions can be activated therm ally. The carb eth oxy group rotates around th e C -N -bond (zJG3oo^ = 64.6 to 66.1 k J • m ole-1) and th e azepine ligand itse lf m oves against th e tricarbonyl m etal groups (A G25o^ = 4 5 .6-52.1 k J • m ole-1). 
  Reference    (Z. Naturforsch. 32b, 408—412 [1977]; eingegangen am 14. Januar 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0408 
 Volume    32 
95Author    Requires cookie*
 Title    The Phase Diagram o f K3FeF6 to 35 kbar and 600 °C  
 Abstract    i c h t e r a n d J . B. Cl a r k N ational P hysical Research L aboratory, C. S. I. R ., P . O. B o x 395, P retoria 0001, R epublic o f South A frica H igh Pressure Phase D iagram , D . T. A. T he effect o f pressure on the tetragonal/cubic phase transition in KsFeFß w as stu d ied to 35 kbar. A new phase which also occurs in K^TiF6, ex ists over a sm all tem perature region a t low pressures. A strong possibility ex ists th a t th e KaFeFö tetragon al phase is iso-structural w ith the corresponding phase found for th e K 3X F 6 (X = Ln, Y) com pounds. 
  Reference    (Z. Naturforsch. 32b, 413—415 [1977]; received July 22 1976/January 17 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0413 
 Volume    32 
96Author    S.Requires cookie*
 Title    Effect of Temperature on the Electrode Kinetics of Totally Irreversible and Quasi-Reversible Polarographie Reductions  
 Abstract    u d h i n d r a S w a r u p S h a r m a , S . K . J h a , a n d M u k h t a r S i n g h D ep artm en t o f C hem istry, E lectrode K in etics, Polarographie R eductions The polarographic behaviour o f N i(II), C o (ll), Z n(II) and M n(II) has been studied in 0.1 M K N O 3 . The tem perature span stu d ied varies from 15 to 55 °C. T he reduction o f N i(II) and Co(II) has been found to be to ta lly irreversible and th a t o f Z n(II) and M n(II) quasi-reversible over th e tem perature span studied. The k inetic param eters, kf h° and a n a for th e to ta lly irreversible reductions have been calcu lated b y K o u t e c k y 's treatm ent w hile for quasi-reversible reduction th e kin etic param eters (a and ks j,) h ave been evaluated by G e l l i n g s ' m ethod. T he activ a tio n energy o f th e to ta lly irreversible reductions has also been determ ined. The effect o f tem perature has been discvissed in term s o f th e variations in the values o f th e kinetic param eters. 
  Reference    (Z. Naturforsch. 32b, 416—419 [1977]; received December 20 1976) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0416 
 Volume    32 
97Author    Requires cookie*
 Title    Elektronenbeugungsbestimmung der Molekülstruktur von 4-Fluor-2  
 Abstract    ,4' ,6' -trimethylbiphenyl M olecular S tru ctu re of 4-F luoro-2',4',6,-trim ethylbiphenyl D eterm ined b y E lectro n D iffraction K . Z e i t z , H . O b e r h a m m e r u n d G . H ä f e l i n g e r In stitu t für organische Chemie und In stitu t für physikalische und theoretische Chemie der U n iv ersitä t Tübingen E lectron D iffraction, M olecular Structure, 4-F luoro-2/,4',6/-trim ethylbiphenyl, Angle o f Torsion 
  Reference    (Z. Naturforsch. 32b, 420—425 [1977]; eingegangen am 23. Dezember 1976) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0420 
 Volume    32 
98Author    S.P S InRequires cookie*
 Title    Studies on the Mixed Ligand Complexes Involving Ligands of Biological Importance (N i(II)/Zn(II)/C d(II)-l,10-phenanthroline-2,2'-bipyridyl-phenylalanine) an d on *  
 Abstract    hem istry D ep artm en t, J . V. College, B araut (Meerut) ** C hem istry D ep artm en t, U n iv ersity o f R ajasthan, F orm ation C onstants, M ixed Ligand D erivatives pH -m etric stu d ies on the interaction o f N i(II), Zn(II) or Cd(II) w ith 1,10-phenanthroline (Phen) or 2 ,2 /-bipyridyl (B ipy) in th e presence o f phenylalanine (Phe) indicate th e form a­ tion o f 1 :1 :1 m ixed ligand ch elates and th eir m onohydroxo derivatives. The addition o f P he tak es place after th e com bination o f P h en or B ipy w ith th e m etal ion is com plete. The form ation con stan ts o f th e resulting com p lexes have b een determ ined at 3 0 + 1 °C and ionic strength (/u) = 0.1 K N O 3 and th e tern ary com plexes involving Phen are found to be more stable than th e corresponding com plexes involvin g B ip y as primary ligand. 
  Reference    (Z. Naturforsch. 32b, 426—429 [1977]; received October 10 1976/January 1 1977) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0426 
 Volume    32 
99Author    Requires cookie*
 Title    Pyrimidine Derivatives and Related Compounds, VII  
 Abstract    Synthesis of Some New Pyrazolo[l,5-a]-S-triazines, Pyrazolo [3,4-c] -as-triazines, Pyrazolo [1,5-a] pyrimidines and Pyrazolo [3,4-b]pyrones M o h a m e d H i l m y E l n a g d i * , E z z a t M o h a m e d Z a y e d , E z z a t M o h a m e d K a n d e e l , a n d S h e r i f M a h m o u d F a h m y D epartm ent o f Chem istry, F a cu lty o f Science, Cairo U n iv ersity , Giza and M ansoura U n iv ersity at E lm ansoura, A. R . E g y p t Pyrim idine D erivatives, P yrazolylth iou rea D eriv a tiv es 3-A m ino-4-phenylhydrazono-2-pyrazolin-5-one (1) reacts w ith isoth iocyan ate to yield 
  Reference    (Z. Naturforsch. 32b, 430—433 [1977]; received October 26 1976) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0430 
 Volume    32 
100Author    V.Requires cookie*
 Title    Photochemistry of (Iso)A lloxazines  
 Abstract    Mechanism of the Photoreaction of Flavin with 1,4-Cyclohexadiene and Analogous Compounds W o l f g a n g -R. K n a p p e Fachbereich B iologie der U n iv ersitä t K onstanz N on-R adical Photoreduction, C ovalent A dducts, H om o ly tic/H etero ly tic D ecom position 
  Reference    (Z. Naturforsch. 32b, 434—437 [1977]; received December 23 1976) 
  Published    1977 
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 Identifier    ZNB-1977-32b-0434 
 Volume    32 
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