TY - BOOK ED - United Nations. Statistical Office. TI - Indexes to the international standard : : industrial classification of all economic activities U1 - 338 UNI PY - 1971/// CY - New York : PB - United Nations, KW - Industries KW - Classification N1 - United nations. [Documents] ST/STAT/ser. M/4/rev. 2/add.1 ER -