Birkeland, P. W. 1984. Soils and geomorphology. New York: Oxford University Press.

Buol, S.W., F.D. Hole, R.W. McCracken, and R.J. Southard. 1997. Soil genesis and classification. 4^thed. Ames, Iowa: Iowa State University Press.

Colman, S. M., and D. P. Dethier. 1986. Rates of chemical weathering of rocks and minerals. New York: Academic Press.

Gauri, K. L. 1978. The preservation of stone. Scientific American 238(6): 126-36.

Krauskopf, K. K., and D. K. Bird. 1995. Introduction to geochemistry. 3d ed. New York: McGraw-Hill.

Ollier, C. D. and C. Pain. 1986. Regolith, Soils, and Landforms. New York: W.H.Freeman.

Reinhardt, J. and W.R. Sigleo. 1988. Paleosols and weathering through geologic time: Principles and applications. Geological Society of America  Special Paper 216.

Robinson, D.A., and R.G. Williams, eds. 1994. Rock weathering and landform evolution. New York: John Wiley & Sons

Singer, M. J., and D. N. Munns. 1986. Soils. New York: Macmillan.

Soil Survey Staff, 1988. Keys to soil taxonomy. 8^th Edition. Natural Resources Conservation Service. U.S. Department of Agriculture.

Wild, A. 1993. Soils and the Environment: An Introduction. New York: Cambridge University Press.

http://soils.ag.uidaho.edu/soilorders/index.htm
University of Idaho Soil Science Division web page contains photos, descriptions, and surveys of the 12 major soil orders.

http://res.agr.ca/cansis/_overview.html
Canadian Soil Information System provides links to detailed soil surveys and land inventories.