Sources
Amato, Ivan. New York, New York: Avon Books, 1977. 21-33.

Bishop, A.C. , W.R. Hamilton, and A.R. Woolley. The Country Life Guide to Minerals, Rocks and Fossils. Middlesex: Country Life Books, 1974.

Brooks, J.R.V., and D.G.A. Whitten. The Penguin Dictionary of Geology. New York: Penguin Books, 1972.

Chesterman, Charles W. The Audubon Society Field Guide to North American Rocks and Minerals. New York: Alfred A. Knopf, Inc., 1978.

MacDonald Encyclopedia of Rocks and Minerals. London: MacDonald & Co., 1977.

McGraw-Hill Encyclopedia of Science and Technology. New York: McGraw-Hill ,1997.

"Burnt Clay Bricks" <http://www.fao.org/inpho/vlibrary/S1250e/S1250E07.htm>

"Kaolinite" <http://www.encyclopedia.com/html/k1/kaolinit.asp>

"The Mineral Montmorillonite" <http://mineral.galleries.com/minerals.silicat/montmori/montmori.html>

"Natural Building Techniques" <http://www.strawbalecentral.com/techniques4.html>

"Pottery Making" <http://www.madison.k12.wi.us/whitehorse/ss/potmake.htm>

<http://www.units.muohio.edu/dragonfly/tools/LITHICS.shtml>

<http://www.corbis.com>

<http://www-2.cs.cmu.edu/~adg/adg-psspimages.html>

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