Greenberg v. Industrial Commission , 23 Ill. 2d 106 ( 1961 )
Penny Cab Co. v. Industrial Commission , 60 Ill. 2d 217 ( 1975 )
Alexander v. Industrial Commission , 72 Ill. 2d 444 ( 1978 )
Area Transportation Co. v. Industrial Commission , 123 Ill. App. 3d 1096 ( 1984 )