Kachinski v. Workmen's Compensation Appeal Board , 516 Pa. 240 ( 1987 )
Associated Plumbing & Heating & CNA Insurance v. Workmen's Compensation Appeal Board , 126 Pa. Commw. 618 ( 1989 )
Commonwealth, Bureau of Worker's Compensation v. Workmen's Compensation Appeal Board , 96 Pa. Commw. 566 ( 1986 )