Eckert v. Burnet , 51 S. Ct. 373 ( 1931 )
Massachusetts Mutual Life Insurance v. United States , 53 S. Ct. 337 ( 1933 )
Helvering v. Price , 60 S. Ct. 673 ( 1940 )
United States v. Mitchell , 46 S. Ct. 418 ( 1926 )