Helvering v. Elbe Oil Land Development Co. , 58 S. Ct. 621 ( 1938 )
Anderson v. Helvering , 60 S. Ct. 952 ( 1940 )
Helvering v. O'DONNELL , 58 S. Ct. 619 ( 1938 )
Helvering v. Bankline Oil Co. , 58 S. Ct. 616 ( 1938 )
Palmer v. Bender , 53 S. Ct. 225 ( 1932 )