The Code of federal regulations of the United States of America having general applicability and legal effect in force June 1, 1938. 1st ed., published by the Division of the Federal register, the National archives, pursuant to section 11 of the Federal register act as amended June 19, 1937.

----- Cumulative supplement to the Code of federal regulations. Washington, U. S. Govt. Print. Off., 1943------ 1939- supplement to the Code of federal regulations. Washington, U. S. Govt. Print. Off., 1940------ 1938 supplement to the Code of federal regulations of the United States of America, containing documents of general applicability and legal effect issued by federal agencies and filed with the Division of the Federal register from June 2, 1938, through December 31, 1938, including Executive orders and Presidential Proclamations in full text, with ancillaries and index. Published by the Division of the Federal register, the National archives, pursuant to section 11 of the Federal register act as amended June 19, 1937. Washington, U. S. Govt. Print. Off., 1940."Codified as of June 1, 1938 ... should be used in conjunction with the annual supplements to the Code and in conjunction with the daily issues of the Federal register."--Pref.Mode of access: Internet