American Experience: Jubilee Singers: Sacrifice and Glory, Part 1, Interview with Katherine Preston, Music Historian, 1 of 2
directed by Llewellyn Smith, fl. 1987-2017; produced by Llewellyn Smith, fl. 1987-2017, WGBH Boston; interview by Llewellyn Smith, fl. 1987-2017, in American Experience: Jubilee Singers: Sacrifice and Glory, Part 1 (Boston, MA: WGBH Educational Foundation, 2017), 24 mins
