Regional integration among developing countries : survey of past performance and agenda for future policy action /
Rolf J. Langhammer and Ulrich Hiemenz.
- Washington, D.C. : Trade Policy Division, World Bank, [1991]
- v, 43 p. ; 28 cm.
- UNDP-World Bank Trade Expansion Program occasional paper ; 7 .
- UNDP-World Bank Trade Expansion Program occasional paper ; 7. .