Liberty loan legislation: 1st liberty bond act, approved Apr. 24, 1917; 2d liberty bond act, approved Sept. 24, 1917; 3d liberty bond act, approved Apr. 4, 1918; 4th liberty bond act, approved July 9, 1918; supplement to 2d liberty bond act, approved Sept. 24, 1918; victory liberty bond act, approved Mar. 3, 1919.