The Youghiogheny & Ohio Coal Company v. Wayne N. McAngues and Director, Office of Workers' Compensation Programs, United States Department of Labor , 996 F.2d 130 ( 1993 )
curtis-b-tussey-sr-v-island-creek-coal-company-and-old-republic , 982 F.2d 1036 ( 1993 )
Freeman United Coal Mining Co. v. William E. Foster , 30 F.3d 834 ( 1994 )
Richardson v. Perales , 91 S. Ct. 1420 ( 1971 )