United States v. Mitchell ( 1971 )
Porter Royalty Pool v. Commissioner of Internal Rev. ( 1948 )
Commissioner of Internal Revenue v. Hopkinson ( 1942 )
McEuen v. Commissioner of Internal Revenue ( 1952 )
Helvering v. Schine Chain Theatres, Inc. ( 1941 )
Smith v. Donnelly ( 1946 )
Mitchell v. Commissioner ( 1969 )
Elton v. Commissioner ( 2000 )