National Automobile Dealers Association (originator), Bell, Frederick J. (Frederick Jackson) (author), Curtis, Laurence (author), Hewitt, Charles M. (author), O'Mahoney, Joseph C. (Joseph Christopher) (1884-1962) (associated name), Sutter, Frederick M. (author), Weaver, Phil (author)
National Automobile Dealers Association (originator), Hamilton, William C. (publishing director), Sullivan, Ray A. (editor), Dimond, Robert Edward (editor), Ahearn, Raymond V. (editor), Cuddy, William (editor), Slack, Munsey (editor), Bell, Frederick J. (Frederick Jackson) (contributor), Riviere, George M., Jr. (contributor), Sinclair, A. Leftwich, Jr. (contributor), Wells, Gilbert H. (contributor), Williams, C.P. 'Jack' (contributor)
Principal roles of DuPont Company founder E.I du Pont and his wife, Sophie, were enacted by Eduard Franz and Sigrid Gurie in dramatic prologue highlighting DuPont's 150th anniversary celebration July 18 on the banks of Brandywine Creek, near Wilmington, Delaware. Mr. Franz and Miss Curie portrayed same roles in motion picture, The DuPont Story.