PEOPLE EX REL. CHICAGO HEIGHTS v. Richton , 43 Ill. 2d 267 ( 1969 )
Kravis v. Smith Marine, Inc. , 60 Ill. 2d 141 ( 1975 )
Illinois Coal Operators Ass'n v. Pollution Control Board , 59 Ill. 2d 305 ( 1974 )