Planning United States participation in the New York World's Fair : hearing before the Subcommittee on International Organizations and Movements of the Committee on Foreign Affairs, House of Representatives, Eighty-seventh Congress, first session, on H.R. 7763, and other bills, to provide for planning the participation of the United States in the New York World's Fair, to be held at New York City in 1964 and 1965, and for other purposes, August 10, 1961.