Williams, William F.
Principles of automated information retrieval
Business Press, 1968
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Baeza-Yates, Ricardo
Modern Information retrieval
Addison-Wesley , 1999
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Toward a national information system: second annual national colloquium on information retrieval
edited by Morris Rubinoff
Spartan Books , 1965
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Information systems compatibility
edited by Simon M. Newman
Spartan , 1965
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Baeza-Yates, Ricardo
Modern information retrieval: the concepts and technology behind search
Addison-Wesley, 2011
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