Amendments to the 1928 Convention Concerning International Expositions, as amended : message from the President of the United States transmitting amendments to the convention of November 22, 1928, concerning international expositions, as amended (TIAS series 6548, 6549, 9948, and Treaty Doc. no. 98-1)
Convention Concerning International Expositions (1928). Protocols, etc. 1988 May 31.