Commissioner v. Groetzinger ( 1987 )
Riss v. Commissioner ( 1971 )
Richard R. Riss, Sr. v. Commissioner of Internal Revenue ( 1973 )
Welch v. Helvering ( 1933 )
Indopco, Inc. v. Commissioner ( 1992 )
Polakis v. Commissioner ( 1988 )
Higgins v. Commissioner ( 1941 )
commissioner-of-internal-revenue-v-transport-manufacturing-and-equipment ( 1973 )