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1. One retrieval system, theory .   Publication: London, Butterworths, 1968 . xii,191p. Date:1968 Availability: Copies available: Turkeyen Campus Science & Technology [Z699 V5 1965] (1), Actions: Add to cart No cover image available No cover image available
2. On retrieval system theory /   Publication: London : Butterworths, 1968 . xxi, 191p. Date:1968 Availability: Copies available: Turkeyen Campus Education & Humanities [Z699 V5 1965] (1), Actions: Add to cart No cover image available No cover image available