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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.2: Social and historical sciences, philosophy and religion (1998)
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Lea, P.W.; Day, A.: Printed reference material and related information sources (1990)
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Coutts, B.E.; Richard, J.B.: Best reference sources 1996 (1997)
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Walford's guide to reference material : Vol.1: Science and technology. 1996 (1996)
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