Supplement 1, Jan. 3, 1939 to Jan. 3, 1941 to the Internal Revenue Code, Vol. 53, Part 1, of the U.S. Statutes at Large. Containing the Sections or Parts of Sections of the Internal Revenue Code Added or Expressly Amended by Laws Enacted by the 76th Congress, also Laws Impliedly Amending or Otherwise Affecting the Internal Revenue Code with Tables of Citations to Statutes.