Provisional central product classification / Statistical Office of the United Nations. - New York : United Nations, 1991. - viii, 296 p. ; 28 cm. - Statistical papers. Series M ; no. 77 . "ST/ESA/STAT/SER.M/77." "United Nations publication sales no. E.91.XVII.7"--T.p. verso. Includes bibliographical references. ISBN: 9211613299 LCCN: 93105348 Subjects--Topical Terms: Commercial productsTicari Ürünler. LC Class. No.: HF1041 / .U56 1991 Dewey Class. No.: 338.02 / UNI 1991