Palmer v. Commissioner , 58 S. Ct. 67 ( 1937 )
Helvering v. Salvage , 56 S. Ct. 375 ( 1936 )
William J. Haag and Edith C. Haag v. Commissioner of Internal Revenue, Commissioner of Internal Revenue v. E. B. Sewall Manufacturing Company , 334 F.2d 351 ( 1964 )
Commissioner v. Duberstein , 80 S. Ct. 1190 ( 1960 )