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Major classification systems: the Dewey centennial : papers presented at the Allerton Park Institute, 9.-12.11.1975 (1976)
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General Classification Systems in a changing world : Proceedings of the FID Classification Symposium held in commemoration of the Dewey centenary, Brussels, Nov. 1976 (1978)
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¬The UDC : Essays for a new decade (1990)
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