Lucas v. Earl , 50 S. Ct. 241 ( 1930 )
Burnet v. Leininger , 52 S. Ct. 345 ( 1932 )
Harrison v. Schaffner , 61 S. Ct. 759 ( 1941 )
Gregory v. Helvering , 55 S. Ct. 266 ( 1935 )