Tony Zbosnik v. Badger Coal Company and Director, Office of Workers' Compensation Programs, United States Department of Labor , 759 F.2d 1187 ( 1985 )
nancy-grizzle-widow-of-bramble-grizzle-v-pickands-mather-and , 994 F.2d 1093 ( 1993 )
Richardson v. Perales , 91 S. Ct. 1420 ( 1971 )