New Colonial Ice Co. v. Helvering , 54 S. Ct. 788 ( 1934 )
Helvering v. Mitchell , 58 S. Ct. 630 ( 1938 )
Welch v. Helvering , 54 S. Ct. 8 ( 1933 )
Rutkin v. United States , 72 S. Ct. 571 ( 1952 )