Proceedings of the fourth Symposium on the Development of Petroleum Resources of Asia and the Far East.. - New York : United Nations (UN) , 1972-1973 - 3vols. : ill. ; 28 cm. - Mineral Resources Development Series No. 41 . Includes bibliographical references. Subjects--Topical Terms: Petroleum--Congresses Gov. Doc. Class. No.: UN ECAFE MRDS-41