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Gull, C.D.: Alphabetic subject indexes and coordinate indexes : an experimental comparison (1953) 0.00

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Source: College and research libraries. 14(1953) no.3, S.276-281

Kreithen, A.; Gull, C.D.; Miller, E.E.: Klassifizierung nach dem System gleichwertiger Grundbegriffe (Uniterm) (1954) 0.00

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Source: Nachrichten für Dokumentation. 5(1954) H.1, S.6-11

Taube, M.; Gull, C.D.; Wachtel, I.S.: Unit terms in coordinate indexing (1952) 0.00

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Source: American Documentation. 3(1953) no.4, S.213-218

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