American Committee for the Foreign Born. American Continental Congress for Peace. American Peace Crusade. CIO Political Action Committee. Civil Rights Congress. Committee for a Democratic Far Eastern Policy. Council of American Soviet Friendship. Council on African Affairs. National Nonpartisan Committee to Defend the Rights of the 12 Communist Leaders. Peace Information Center. United Electrical, Radio & Machine Workers of America. Form letters, postcards, leaflets, pamphlets, statements, press releases, 1948-1952, 1, Box: 8. Progressive Party Records, MsC0160. University of Iowa Special Collections. https://aspace.lib.uiowa.edu/repositories/2/archival_objects/41025 Accessed April 23, 2024.