Public laws, 84th Congress. 815. H. J. Res. 604. joint resolution authorizing the President to invite States of Union and foreign countries to participate in United States World Trade Fair to be held in New York City, N. Y., Apr. 14-Apr. 27, 1957, and in Oklahoma Semi-Centennial Celebration to be held in various communities in Oklahoma, Jan. 1-Dec. 31, 1957.