Jackie L. HAYS, Jr., Plaintiff-Appellant, v. Louis W. SULLIVAN, Secretary of Health and Human Services, Defendant-Appellee , 907 F.2d 1453 ( 1990 )
George W. WALKER, Plaintiff-Appellant, v. Otis R. BOWEN, Secretary, Department of Health and Human Services, Defendant-Appellee , 889 F.2d 47 ( 1989 )
Richardson v. Perales , 91 S. Ct. 1420 ( 1971 )