Cumulative index of congressional committee hearings (not confidential in character) from the Seventy-fourth Congress (January 3, 1935) through Eighty-fifth Congress (January 3, 1959) in the United States Senate Library. Indexed and compiled under the direction of Felton M. Johnston, secretary of the Senate, by Richard D. Hupman, librarian [and others] Washington, U.S. Govt. Print. Off., 1959.