Mining in Grand Canyon, in Breed, W.J., and Roat, E.C., eds., Geology of the Grand Canyon

Billingsley, G.H., 1974, Mining in Grand Canyon, in Breed, W.J., and Roat, E.C., eds., Geology of the Grand Canyon: Flagstaff, Museum of Northern Arizona, and Grand Canyon Natural History Association, p. 170-176.