E.I. du Pont de Nemours & Company (associated name), McCoy, Charles Brelsford, 1909-1995 (associated name), Opinion Research Corporation (U.S.) (originator)
E.I. du Pont de Nemours & Company (originator), McCoy, Charles Brelsford, 1909-1995 (correspondent), Opinion Research Corporation (U.S.) (associated name), E.I. du Pont de Nemours & Company. Public Relations Department (associated name)