Hoekstra v. Farm Bureau Mutual Insurance Co. , 382 N.W.2d 100 ( 1986 )
Donnelly v. BD. OF TR. OF FIRE RET. SYSTEM , 403 N.W.2d 768 ( 1987 )
Willis v. City of Des Moines , 357 N.W.2d 567 ( 1984 )