D. Puerto Rico May 1977 casesUnion de Trabajadores Petroquimicos v. Union Carbide Caribe, Inc.Schroeder v. Federal Nat. Mortg. Ass'nAlberio v. HamptonAirlantic Transport, Inc., Matter ofCervoni v. United States Secretary of Health, Ed. and WelfareW. Clay Jackson Enterprises v. Greyhound Leasing