Helvering v. Gowran , 58 S. Ct. 154 ( 1937 )
United States v. Ryan , 52 S. Ct. 65 ( 1931 )
Hecht v. Malley , 265 U.S. 144 ( 1924 )
Commissioner v. Glenshaw Glass Co. , 75 S. Ct. 473 ( 1955 )