Dewey decimal classification, 20th edition a study manual - Osborn, Jeanne; Comaromi, John P. (John Phillip) 1937-; Dewey, Melville 1851-1931 (Englewood, CO Libraries Unlimited, 1991)
Keywords: Classification, Dewey decimal -- Evaluation -- Handbooks, manuals, etc; Classification, Dewey decimal -- History -- Handbooks, manuals, etc; Classification -- Books -- Handbooks, manuals, etc