Smithsonian Channel ; National Endowment for the Humanities ; Spark Media ; directed by Andrea Kalin ; produced by Andrea Kalin, David A. Taylor, James Mirabello ; written by David A. Taylor, Olive Emma Bucklin, Andrea Kalin
a Florentine Films production ; directed by Ken Burns ; written by Dayton Duncan ; produced by Dayton Duncan, Ken Burns, Julie Dunfey ; produced in association with WETA Washington, DC ; a film by Ken Burns