Harmon Mining Co. v. Workmen's Compensation Appeal Board , 157 Pa. Commw. 326 ( 1993 )
Callahan v. Workmen's Compensation Appeal Board , 132 Pa. Commw. 47 ( 1990 )
Fells v. Workmen's Compensation Appeal Board , 122 Pa. Commw. 399 ( 1988 )