Penczkowski v. Workmen's Compensation Appeal Board , 97 Pa. Commw. 419 ( 1986 )
N. Phila. Av. Ctr. v. Wcab (Regan) , 121 Pa. Commw. 633 ( 1988 )
Thissen v. Workmen's Compensation Appeal Board , 137 Pa. Commw. 227 ( 1991 )