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Lowery, J.: Online bibliographic services from The British Library's National Bibliographic Service (1997)
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Greenwood, D.: OPAC research in the UK (1989)
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Ashton, J.: ONE: the final OPAC frontier (1998)
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Elliot, J.D.: ¬The British Library Map Library's cartographic materials file (1992)
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Ashton, J.: ¬The British Library Network OPAC (1994)
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