Proposed World's Fair for Detroit, 1972 : hearing before the Subcommittee on International Organizations and Movements of the Committee on Foreign Affairs, House of Representatives, Eighty-eighth Congress, first session, on H. Con. Res. 173, a concurrent resolution expressing appreciation to certain citizens of Michigan for their activities in planning and working for the World's Fair proposed to be held in Detroit, Mich., 1972, December 11, 1963. (U.S. Govt. Print. Off, 1964)