Helene Marcus v. Joseph A. Califano, Jr., Secretary of Health, Education and Welfare , 615 F.2d 23 ( 1979 )
Walter E. Parker v. Patricia Roberts Harris, Secretary of Health, Education and Welfare , 626 F.2d 225 ( 1980 )
Richardson v. Perales , 91 S. Ct. 1420 ( 1971 )