Proceedings 4th international , 6th Annual Conference of Gesellschaftfur Kassifikation e.v Augsburg,28th june-27th July 1982.vol.1 - Dahlaberg, Ingetraut .; International study conference on Classification Research,Universal classification I : subject analysis and ordering system Augsburg ) 1982 (Frankfurt : Indeks verlag, 1982)
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Keywords: UNIVERSAL CLASSIFICATION