Civil rights--1957 : hearings before the Subcommittee on Constitutional Rights of the Committee on the Judiciary, United States Senate, Eighty-fifth Congress, first session on S. 83, an amendment to S. 83, S. 427, S. 428, S. 429, S. 468, S. 500, S. 501, S. 502, S. 504, S. 505, S. 508, S. 509, S. 510, S. Con. Res. 5, proposals to secure, protect, and strengthen civil rights of persons under the Constitution and laws of the United States, February 14, 15, 16, 18, 19, 20, 21, 26, 27, 28, March 1, 4, and 5, 1957.