1. Parikka, Jussi. A Geology of Media. Minneapolis: University of Minnesota Press, 2015.
2. Fuller, Buckmister. Operating Manual for Spaceship Earth. Carbondale: Southern Illinois University Press, 1969. law of conservation of energy - “Energy is not only conserved but it is also finite. It is a closed system. The universe is a mammoth perpetual motion process. We then see that the part of our wealth which is physical energy is conserved. It cannot be exhausted, cannot be spent, which means exhausted. We realize that the word ‘spending’ is now scientifically meaningless and is therefore obsolete.” (90)
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Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service. Sampling Soils General Sampling Procedures.