Country Music, Episode 1, The Rub (Beginnings –1933)
directed by Ken Burns, 1953-; produced by Julie Dunfey, fl. 1999-2012, Dayton Duncan, fl. 1998-2012 and Ken Burns, 1953-, Florentine Films, in Country Music, Episode 1 (Arlington, VA: Public Broadcasting Service, 2019), 1 hour 52 mins