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Hildreth, C.R.: Online Public Access Catalogs (1985)
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Hildreth, C.: To Boolean or not to Boolean? (1983)
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Hildreth, C.R.: Intelligent interfaces and retrieval methods for subject searching in bibliographic retrieval systems (1989)
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Hildreth, C.R.: Online public access catalogs : the user interface (1982)
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Rao, S.S.: Information retrieval services : role of optical technologies (1997)
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