Classification by broad economic categories : defined in terms of SITC rev. 2 - United Nations. Statistical Office; United Nations. Statistical Office. Standard international trade classification revision 3. (New York : United Nations, 1976)
"ST/ESA/STAT/SER.M/53/rev. 2."
"United Nations publication sales no. E.86.XVII.24"--T.p. verso.
Keywords: Commercial products -- Classification