Portfolio for peace : excerpts from the writings and speeches of U Thant, Secretary-General of the United Nations, on major world issues 1961-1968 / United Nations. United Nations. United Nations. Office of Public Information. United Nations. Arbitration (International law) 341.1 UNP Includes bibliographical references (p. 42-44). New York : United Nations, 1968. 1968. 1968 Text 109 p. ; eng