Non-self-governing territories : summaries of information transmitted to the Secretary-General during 1956/ United Nations. United Nations. Secretary-General. United Nations. General Assembly. Committee on Information from Non-Self-Governing Territories. International trusteeships Periodicals. Colonies Social conditions Periodicals. 341.106 UNN Title varies slightly. Some years also have Special study supplements, which continues numbering of main series. Description based on: 1955. Issued by United Nations Committee on Information from Non-Self-Governing Territories. New York : United Nations, 1957. 1957. 1957 Text Collection v. ; eng