International Economic Association & Machlup, F. (1976). Economic integration: Worldwide, regional, sectoral : proceedings of the fourth congress of the International Economic Association held at Budapest, Hungary. Macmillan Press ; distributed in the U.S. by Halsted Press.

International Economic Association and Fritz Machlup. Economic Integration: Worldwide, Regional, Sectoral : Proceedings of the Fourth Congress of the International Economic Association Held at Budapest, Hungary. London ; New York : New York: Macmillan Press ; distributed in the U.S. by Halsted Press, 1976.

International Economic Association and Fritz Machlup. Economic Integration: Worldwide, Regional, Sectoral : Proceedings of the Fourth Congress of the International Economic Association Held at Budapest, Hungary. Macmillan Press ; distributed in the U.S. by Halsted Press, 1976.