[602] 53 Stat. 1239, August 7, 1939, Sec. 1 (d).

[603] 56 Stat. 226, 244, April 28, 1942, Sec. 401.

[604] 48 Stat. 591, April 14, 1934, Sec. 1.

[605] 48 Stat. 58, May 18, 1933.

[606] Id., Sec. 23.

[607] 48 Stat. 933, June 12, 1934, Sec. 20.

[608] 48 Stat. 1064, June 19, 1934, Title I, Sec. 4 (k).

[609] 60 Stat. 664, July 25, 1946, Sec. 1A (b) (c).

[610] 61 Stat. 136, June 23, 1947, Sec. 210.

[611] 65 Stat. 75, June 19, 1951, Sec. 4 (k).