- Supreme Court of the United States | Monday, June 19, 1989 | Cited 0 times
- Court of Appeals for the Eighth Circuit | Monday, April 13, 1981 | Cited 0 times
- Supreme Court of the United States | Monday, March 18, 1968 | Cited 0 times
- District Court, D. Nebraska | Wednesday, January 27, 1993 | Cited 0 times