Humphrey v. Commissioner of Internal Revenue ( 1947 )
Welch v. Helvering ( 1933 )
Vernon F. Harp and Vera Harp v. Commissioner of Internal Revenue ( 1959 )
Ersel H. Beus and Anna Beus, W. J. Beus, and Leone Beus v. Commissioner of Internal Revenue ( 1958 )
Lilly v. Commissioner ( 1952 )