National Security Act of 1947, P.L. 80-253, 61 Stat. 495--Establishes a Secretary of Defense and the separate departments for Army, Navy and Air Force within the national military establishement and allows for the coordination of said departments with other governmental agencies concerned with the national security.
Marx Library Gov Docs Bookstacks (Non-Circ, 2nd FL South)
U.S. Statutes at Large, AE 2.111:61/pt.1, p. 495-510