Indexes to the International standard industrial classification of all economic activities / United Nations Statistical Office. International standard industrial classification of all economic activities. United Nations. Statistical Office. United Nations. Statistical Office. International standard industrial classification of all economic activities. JX1977 .A2 ST/STAT/ser. M/4, rev.1, add.1 330 UNI United Nations [Document] ST/STAT/ser.M/4/rev. 1/add.1. "United Nations publication. Sales no.: 59.XVII.9." New York : United Nations, 1971. 1971. 1971 Text v. ; eng United Nations; Statistical Office; Statistical papers / M no. 4, rev. 1, add.1, Indexed ed