Radiotelephones on certain cargo vessels in Hawaiian waters: hearings before a subcommittee of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-eighth Congress, second session, on H.R. 8508 [and other] bills to amend section 356 of the Communications Act of 1934, to permit cargo ships on voyages between Hawaiian ports to carry radiotelephone in lieu of radio-telegraph installations, February 19, March 19, 1964.