Intracanyon lava flow in the base of western Grand Canyon [abs.], in Geological Society of America, Annual Meeting, 50th, 1937, Proceedings

Schenk, E.T., 1938, Intracanyon lava flow in the base of western Grand Canyon [abs.], in Geological Society of America, Annual Meeting, 50th, 1937, Proceedings: Geological Society of America, p. 251.