Grimes, G. H. (1969). Information services: A survey of the history and present status of the field. Michigan-Ohio Regional Educational Laboratory.
Citace podle Chicago (17th ed.)Grimes, George H. Information Services: A Survey of the History and Present Status of the Field. Detroit: Michigan-Ohio Regional Educational Laboratory, 1969.
Citace podle MLA (8th ed.)Grimes, George H. Information Services: A Survey of the History and Present Status of the Field. Michigan-Ohio Regional Educational Laboratory, 1969.
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