Telefona gönder: Providing for safe loading and discharging of explosives transported by vessel : hearings before the Special Subcommittee on the Loading and Unloading of Explosives of the Committee on Merchant Marine and Fisheries, House of Representatives, Eighty-second Congress, second session, on H.R. 6521 ... H.R. 6566 ... H.R. 6580 ... May 12, 20, and 21, 1952.