The 384 references in this bibliography represent a selection of recent literature (post 1960) on the Universal Decimal Classification (UDC). More selectivity is applied to earlier literature, and only the more significant items, generally of substantial importance, are chosen from publications earlier than 1950. The objective is to assemble a list in English and other languages that would present a well-balanced record of the nature of the UDC as a major ordering system among the established classification systems. Publications of the UDC (full or abridged) individual schedules, and amendments are not included. (Author)