References:

American Society of Agricultural Engineers (ASAE), 2001. Put a power plant on your back. Engineering & Technology for a Sustainable World 8:4

Arizona Public Service (APS), 2001. Energy Use Worksheet. Retrived 27 November 2001 from http://www.aps.com/my_community/Solar/solar_11.html

Ashley, Steven, 1989. New Life for Solar? Popular Science. 234:117-124.

Bond, Martin, 2000. Solar Energy Seeing the Light. Geographical 72:28-32.

Carnes, Richard, 2001. To PV or not to PV. Mother Earth News p34.

Craig, James R., David J. Vaughan, and Brian J. Skinner. 2001. Resources of the Earth,Third Edition. Prentice-Hall,New Jersey, 520 pages.

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