Commodity trade statistics 1971 : Vol. 21. no. 1-7 / United Nations. United Nations. United Nations. Statistical Office. United Nations. Statistical Division. Commercial statistics Statistics Periodicals. 382 UNC Numbers for 1951 called preliminary and 2d-4th issue. Vols. for 1960-1961 issued in 2 pts.: Pt. 1, Imports; Pt. 2, Exports. Each year issued in several fascicles, <1981>-1994. Issued by: the Statistical Division of the United Nations, <1991>-1994. Ceased in paper and continued in microfiche only. SERBIB/SERLOC merged record New York : United Nations, 1971. 1971. 1971 Text Collection v. ; eng