Inscription: Signed in pencil, verso BC: "HAROLD EDGERTON"; inscribed in unknown hand in pencil, verso BRC: "3512.1006"
Edgerton, Harold, and James R. Killian, Jr. Flash! Seeing the Unseen by Ultra-High Speed Photography. Boston: Hale, Cushman & Flint, 1939. p. 120.
Edgerton, Harold, and James R. Killian, Jr. Moments of Vision: The Stroboscopic Revolution in Photography. Cambridge, Mass.: MIT Press, 1979. pp. 22–23.