Revocation or denial of seamen's documents to narcotic law violators : hearing before a subcommittee of the Committee on Interstate and Foreign Commerce, United States Senate, Eighty-third Congress, second session, on H.R. 8538, an act to provide for the revocation or denial of Merchant Marine documents to persons involved in certain narcotics violations. June 16, 1954. (U.S. G.P.O., 1954)