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DeHart, F.; Scott, L.: Multifile searching on classification codes in mathematics : the problem of level of specifity (1993)
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Elliot, J.D.: ¬The use of OPACs (Online Public Access Catalogues) in map libraries (1991)
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Lambert, N.: ORBIT'S PowerSearch : what's great, what's missing (1994)
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Lucas, T.A.: Time patterns in remote OPAC use (1993)
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Thompson, D.M.: Online public access catalogs and user instruction (1994)
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