Bass, T. A., 1990,  "Camping with the Prince, and Other Tales
of Science in Africa", Houghton Mifflin, Boston, 304 pp.

Buhner, S. H., 1996, "Sacred Plant Medicine", Rhinehart Publishers, Boulder, CO, 210 pp.

Campbell, D. G., 1992, "The Crystal Desert - Summers in Antarctica"

Cook, E. 1971:  "The flow of energy in an industrial society",
Scientific American, 263, 135-144.

Davis, W., 1997:  "One River", Simon and Schuster, NY, 537 pp.

DeLoria, V., 2006: "The World We Used to Live In", Fulcrum Publishing, Golden, CO, 237 pp.

Diamond, J., 2005: "Collapse:  How Societies Choose to Fail or
Succeed", Penguin Press, New York.

Ehrlich, P., and A. H. Ehrlich, 1970: "Population, Resources, 
Environment:  Issues in Human Ecology",  Freeman and Co., 383 pp.

Flannery, T., 1998:  "Throwim' Way Leg", Grove Press, 326 pp.

Harte, J., 1985:  "Consider a Spherical Cow.  A Course in
Environmental Problem Solving", William Kaufmann, Inc., 283 pp.

Gates, David M., 1993: "Climate Change and its Biological
Consequences", Sinauer Associates, Sunderland, MA, 280 pp. 

Grant, Richard, 2011: "Crazy River, Exploration and Folly in East Africa",
Simon and Schuster, New York NY, 336 pp.

Gore, A., 1993:  "Earth in the Balance - Ecology and the Human Spirit", Penguin Books, New York, 407 pp.

Hawken, P., "The Ecology of Commerce-  A Declaration of
Sustainability", 1993, Harper Business Press, New York, NY, 250 pp.

Hawken, P., et al., 1999: "Natural Capitalism", Little, Brown and Co., NY, 396 pp.

Houghton, J. T., 1997,  "Global Warming:  The Complete Briefing", Cambridge University Press, 251 pp.

Intergovernmental Panel on Climate Change (IPCC), 2007: 
http://www.ipcc.ch/publications_and_data/publications_and_data_reports.shtml; Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.

Leopold, A., 1949, "A Sand County Almanac", Ballantine, NY, 295 pp.

Little, C. E., 1995:  The Dying of the Trees, Penguin Books, New York, 275 pp.

Lovelock, J., 1988:   "The Ages of Gaia.  A Biography of Our
Living Earth", Bantam Books, 252 pp.

Maser, C.,  "Forest Primeval- The Natural History of an Ancient Forest", 1989, Stoddart Publ. Co., Toronto Canada, 282 pp.

Managing Planet Earth, Readings from Scientific American, 1990, W. H. Freeman, New York, 146 pp.

Maxwell, N., 1961, "Witch Doctor's Apprentice", MJF Books, NY, 391 pp.

Mazer, J., 1997:  "Solar Cells:  An Introduction to Crystal
Photovoltaic Cells", Kluwer, 216 pp.

McKibben, B., 1995: "Hope, Human and Wild", Little, Brown, 227 pp.

McKibben, B., 2003: "Enough:  Staying Human in and Engineered Age", Holt and Co., New York, 271 pp.

Montgomery, J., 1999:  "Biotechnology, Safety, and Diversity",
Enfield Science Publishers.

Murie, M. E., 1997:  "Two in the Far North", Alaska Northwest Books, Anchorage, 370 pp.

Nash, Roderick F., 1990:   "American Environmentalism, Readings in Conservation History", McGraw-Hill, 364 pp.

Nash, Roderick F., 1989:   "The Rights of Nature: A History of Environmental Ethics", University of Wisconsin Press, 290 pp.

Neihardt, John G., 1932:   "Black Elk Speaks", University of
Nebraska Press, 298 pp.

Peet, J., 1992: "Energy and the Ecology of Sustainability", Island Press, 309 pp.

Plotkin, M., 1993: "Tales of a Shaman's Apprentice", Penguin, 328 pp.

Pollan, M., 2001:  "The Botany of Desire"

Pollan, M., 2006: "The Omnivore's Dilemma - A History of Four Meals"

Quammen, D., 1996: "The Song of the Dodo", Simon and Schuster, NY, 702 pp.

Roszak, T., Ed., 1995: "Ecopsychology, Restoring the Earth,
Healing the Mind", Sierra Club Books, San Francisco, 338 pp.

Schlesinger, William H., 1991:   "Biogeochemistry:  An Analysis of Global Change", Academic Press, 443 pp.

Wallace, A., 1994: "Green Means", 251 pp., KQED books.

Waters, Frank, 1963,  "Book of the Hopi", Penguin Books, 345 pp.

Weiner, J., 1990,  "The Next One Hundred Years:  Shaping the Fate of Our Living Earth", Bantam Books, 312 pp.

Wilson, Edward O., 1992:   "The Diversity of Life", Harvard
University Press, Cambridge, MA, 424 pp.