Earthquakes and seismicity of the Grand Canyon region, Chap. 18, in Beus, S.S., and Morales, Michael, eds., Grand Canyon geology
Brumbaugh, D.S., 1990, Earthquakes and seismicity of the Grand Canyon region, Chap. 18, in Beus, S.S., and Morales, Michael, eds., Grand Canyon geology: New York, Oxford University Press, p. 435-442.