External Links

    Journal: Inf. Process. Manage.

    Volume 7, Issue 1

    1 -- 18Pranas Zunde. Structural models of complex information sources
    19 -- 37William S. Cooper. A definition of relevance for information retrieval
    39 -- 50T. C. Hines, Jessica L. Harris. Columbia university school of library service system for thesaurus development and maintenance
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