1. Abernethy, V. D. (2006). Census Bureau Distortions Hide Immigration Crisis: Real Numbers Much Higher. Press Report. Vanderbilt University School of Medicine. Nashville, TN.
2. American Wind Energy Association (AWEA) (2000). Wind Energy: The Fuel Of The Future Is Ready Today. (February 10, 2002; http://www.awea.org/pubs/factsheets/wetday.pdf ).
3. Amity Technology (2007). Harvesters (March 31, 2007; http://www/amitytech.com.harvesters/6and8row.php ).
4. Batty, J. C., and Keller, J. (1980). Energy requirements for irrigation. In Pimentel, D. (ed.), Handbook of Energy Utilization in Agriculture. CRC, Boca Raton, FL, pp. 35–44.
5. Block, G. (2004). Foods Contributing to Energy Intake in the U.S. Journal of Food Composition and Analysis 17: 3–4439–447.