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Crawford, J.C.; Powles, J.A.: Inhouse (locally generated) subject indexes mounted on academic library OPACs (1991) 1.00
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Crawford, J.C.; Thorn, L.C.; Powles, J.A.: ¬A survey of subject access to academic library catalogues in Great Britain : a report to the British Library Research and Development Department (1992) 1.00
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Crawford, J.C.; Thom, L.C.; Powles, J.A.: ¬A survey of subject access to academic library catalogues in Great Britain (1993) 1.00
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