upper right in plate: Hart; lower right in graphite: Pop Hart; lower left corner in graphite by unknown hand: Dance of Centaurs
- Cahill, Holger. George O. 'Pop' Hart: Twenty-Four Selections from His Work. New York: The Downtown Gallery, 1928, p. 23, no. 50.
- Beall, Karen F., and David W. Kiehl. Graphic Excusrions: American Prints in Black and White, 1900-1950, Selections from the Collection of Reba and Dave Williams. Boston, Massachusetts: D. R. Godine, 1991, p. 19.