D. Puerto Rico April 1977 casesFebus Nevárez v. SchlesingerDiaz v. Secretary of Health, Ed. and WelfarePiovanetti Pujals v. First Nat. City BankCaballero v. Secretary of H.E.W.Supermercados San Juan, Inc., Matter ofDavid Gonzalez v. CaleroMatter of Cuba Elec. Furniture Corp.Rivera v. FordMedina v. Secretary of Health, Ed. and Welfare