Wadlington v. Mindes , 45 Ill. 2d 447 ( 1970 )
Southern Illinois Asphalt Co. v. Pollution Control Board , 60 Ill. 2d 204 ( 1975 )
GRIFFITTS CONSTRUCTION CO., INC. v. Dept. of Labor , 76 Ill. 2d 99 ( 1979 )