- Supreme Court of Iowa | Wednesday, October 19, 1988 | Cited 0 times
- Supreme Court of Iowa | Wednesday, April 22, 1998 | Cited 0 times
- California Supreme Court | Friday, October 24, 1969 | Cited 0 times
- Supreme Court of Iowa | Wednesday, August 30, 1978 | Cited 0 times
- Supreme Court of Iowa | Wednesday, March 17, 1982 | Cited 0 times