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