Bhattacharya, Ganesh; Ranganathan, Shri Radha (1974). "From knowledge classification to library classification". In Wojciechowski, …
Bhattacharya, Ganesh; Ranganathan, Shri Radha (1974). "From knowledge classification to library classification". In Wojciechowski, Jerzy A. (ed.). Ottawa Conference on the Conceptual Basis of the Classification of Knowledge, 1971. Munich: Verlag Dokumentation. pp. 119–143.^ Bliss, Henry Evelyn (1933). The organization of knowledge in libraries. New York: H. W. Wilson.
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