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Butcher, J.E.; Trotter, R.: Building on PRECIS : strategies for online subject access in the British Library (1989)
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New, G.; Trotter, R.: ¬La revisione delle scienze della vita per la ventunesima Dewey (1997)
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Trotter, R.: ¬The use of Dewey in BNB (1976)
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Trotter, R.; Woodhouse, S.: On the road with DDC (1993)
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Trotter, R.: Electronic Dewey : the CD-ROM version of the Dewey Decimal Classification (1995)
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Trotter, R.: Dewey 21 : a personal view (1997)
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New, G.; Trotter, R.: Revising the life sciences for Dewey 21 (1996)
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