Your search Phelps Dodge Mining Company, Tyrone Branch; Phelps Dodgecopper Products Company, El Paso Rod Mill, Petitioners, v. National Labor Relations Board, Respondent.united Steelworkers of America, International Brotherhood Ofteamsters Local 104, International Union Ofoperating Engineers, Local No. 953,afl-cio, Intervenors,american Mining Congress, Amicus Curiae did not match any document.