Public [joint] resolution 54-74, 72d Congress. Chicago, A Century of Progress. H. J. Res. 561, joint resolution amending sec. 2 of joint resolution authorizing the President, under certain conditions, to invite participation of other nations in Chicago World's Fair, providing for admission of their exhibits, and for other purposes, and amending sec. 7 of act to protect copyrights and patents of foreign exhibitors at A Century of Progress (Chicago World's Fair Centennial Celebration), to be held at Chicago, Ill., in 1933.