Helvering v. American Dental Co. ( 1943 )
United States v. Beacon Brass Co. ( 1952 )
Commissioner v. Jacobson ( 1949 )
Opper v. United States ( 1954 )
Holland v. United States ( 1955 )
Smith v. United States ( 1954 )
Spies v. United States ( 1943 )