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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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Chalcraft, A. (Bearb.): Walford's concise guide to reference material (1992)
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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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Lea, P.W.; Day, A.: Printed reference material and related information sources (1990)
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¬The reference sources handbook (1996)
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- Lea, P.W. u. A. Day