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