Floyd F. Cavitt v. Richard S. Schweiker, Secretary of the Department of Health and Human Services , 704 F.2d 1193 ( 1983 )
Michael L. Johnson v. Secretary of Health and Human Services , 794 F.2d 1106 ( 1986 )
Richardson v. Perales , 91 S. Ct. 1420 ( 1971 )