Kellogg Switchboard & Supply Corp. v. Department of Revenue , 14 Ill. 2d 434 ( 1958 )
Ingersoll Milling MacHine Co. v. Department of Revenue , 405 Ill. 367 ( 1950 )
Bucyrus-Erie Co. v. Lorenz , 26 Ill. 2d 183 ( 1962 )