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References and Further Reading

Gregory, H.E., 1917, Geology of the Navajo Country -- A reconnaissance of parts of Arizona, New Mexico, and Utah, U.S. Geological Survey Professional Paper 93.

Hack, J.T., 1945, Recent geology of the Tsegi Canyon, in Archaeological Studies in Northeast Arizona by R.L. Beals, G.W. Brainerd, and W. Smith, University of California Publications in American Archaeology and Ethnology, Volume 44, Number 1, University of California Press, Berkeley.

Hanks, T.C., Blair, J.L., and Webb, R.W., 2010, Virtual repeat photography, in Repeat Photography: Methods and Applications in the Natural Sciences, p. 24-31, 5 color plates, R.H. Webb, D.E. Boyer, and R.M. Turner, eds., Island Press, Washington, DC.

Hassell, H., 1999, Rainbow Bridge -- An illustrated history, pp.173, Utah State University Press, Logan.

Hegemann, E.C., 1963, Navajo Trading Days, pp.388, The University of New Mexico Press.

Kluckhohn, C.K., 1933. Beyond the Rainbow, Christopher Publishing House, Boston.