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IBZ-CD-ROM: Internationale Bibliographie der Zeitschriftenliteratur aus allen Gebieten des Wissens : CD-ROM (1994-)
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- Zeller, O. u. W. Zeller
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IBZ-CD-ROM: Internationale Bibliographie der Zeitschriftenliteratur aus allen Gebieten des Wissens : CD-ROM (1997)
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- Zeller, O. u. W. Zeller
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IBZ-CD-ROM: Internationale Bibliographie der Zeitschriftenliteratur aus allen Gebieten des Wissens : CD-ROM (1994)
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- Zeller, O. u. W. Zeller
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Walford's guide to reference material : Vol.1: Science and technology. 1996 (1996)
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- Mullay, M. u. P. Schlicke
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Walford's guide to reference material : Vol.3: Generalia, language and literature, the arts (1998)
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- Chalcraft, A., R. Prytherch u. S. Williams
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Walford's guide to reference material : Vol.1: Science and technology (1999)
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- Mullay, M. u. P. Schlicke
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Walford's guide to reference material : Vol.2: Social and historical sciences, philosophy and religion (1998)
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- Day, A. u. M. Walsh