Pennsylvania Railroad (Corporate Name) (associated name), Passenger Service Improvement Corporation of Philadelphia (correspondent), Philadelphia (Pa.). Department of Public Property (correspondent), Southeastern Pennsylvania Transportation Compact (associated name)
E.I. du Pont de Nemours & Company (associated name), Hagley Museum and Library (associated name), Copeland, Lammot du Pont, 1905-1983 (addressee), Du Pont, Pierre S. (Pierre Samuel), 1870-1954 (correspondent), James, Marquis, 1891-1955 (author), Saturday evening post (publisher)
E.I. du Pont de Nemours & Company (associated name), Hagley Museum and Library (associated name), Copeland, Lammot du Pont, 1905-1983 (addressee), Brayman, Harold, 1900-1988 (correspondent), Evening Journal (Wilmington, Del.) (publisher)
National Association of Manufacturers (U.S.) (originator), Hagedorn, George (depicted), Compton, Ralph T. (depicted), Sommerhauser, J. E. (Joseph Eugene), 1918-1996 (depicted), Burris, Ed C. (depicted), Stonecipher, Eldo Hugh, 1910-1988 (depicted), Dickey, George A. (depicted)