Klein v. United States , 51 S. Ct. 398 ( 1931 )
Smith v. Shaughnessy , 63 S. Ct. 545 ( 1943 )
Helvering v. Hallock , 60 S. Ct. 444 ( 1940 )
United States v. Pelzer , 61 S. Ct. 659 ( 1941 )
Maass v. Higgins , 61 S. Ct. 631 ( 1941 )