International Trade Statistics Yearbook-United Nations Bobst Ref6 Desk Current, and Int'l. Commodity Trade Statistics . United Nations Bobst Ref6 Int'l. 3080-S1 Four digit SITC code coverage most UN member countries. Import and export data between UN member countries is converted to a common format for easy comparability.
Values are in U.S. dollars, converted using weighted exchange rates.
When available, quantities are given in metric units. As with most UN materials, these are rather late in coming out. Handbook of International Trade and Development Statistics . Bobst Ref6 Int'l. Docs Aisle 16, sales section II.D. 1986- Data largely drawn from other sources, but nicely presented, providing time series whenever possible.