Feenstra, Robert C. - 1997
System (HS), Standard International Trade Classification (SITC, Revisions 2 and 3), and Standard Industrial Classification …This paper describes data on U.S. exports from 1972-1994, classified according to the Schedule B' system, Harmonized … exports. U.S. Exports, 1972-1994,' which can be ordered for $50 from the Publications Department, NBER, 1050 Massachusetts …