D. Puerto Rico May 1971 casesAyala v. Secretary of Health, Education and WelfareCardona v. Secretary of H., E., W.Salgado v. Employers Ins. of WausauInversiones Financieras C. Por A. v. Hitachi Sales Caribe, Inc.Rexco Indus. v. Commercial Ins. Co. of Newark, N.J.Franqui v. Secretary of Health, Education WelfareSears Roebuck Co. v. Herbert H. Johnson Ass.