National defense. Extension of lend-lease act, hearings, 78th Congress, 1st session, on H. R. 1501, to extend for one year provisions of act to promote defense of United States, approved Mar. 11, 1941, Jan. 29, Feb. 2, 3, 4, 8, 9, 10, 15, 16, 17, 23, 1943.