added 01/23/12
American Institute or Cancer Research. Recommendations for Cancer Prevention http://preventcancer.aicr.org/site/PageServer?pagename=recommendations_05_red_meat
Capper, J. L., The environmental impact of U.S. beef production: 1977 compared with 2007 J ANIM SCI jas.2010-3784 http://jas.fass.org/content/89/12/4249.full.pdf+html
College of Agriculture at California State University, Grass-fed Beef informational website www.csuchico.edu/agr/grassfedbeef/health-benefits/index.html
Environmental Protection Agency.National Water Quality Inventory: Report to Congress. 2004 Reporting Cycle http://www.epa.gov/owow/305b/2004report/2004_305breport.pdf
Koneswaran, G. and Nierenberg, D.,Global Farm Animal Production and Global Warming: Impacting and Mitigating Climate Change Environ Health Perspect. 2008 May; 116(5): 578–582. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2367646/
Pimentel, D., et al., Water Resources: Agriculture, the Environment, and Society. Published by: University of California Press on behalf of the American Institute of Biological Sciences Vol. 47, No. 2, Feb., 1997 (pp. 97-106) http://ecommons.cornell.edu/bitstream/1813/352/1/pimentel_report_04-1.pdf
Roussell et al.,. Beef in an Optimal Lean Diet study: effects on lipids, lipoproteins, and apolipoproteins. Am J Clin Nutr2012; 95(1):9-16 http://www.ajcn.org/content/95/1/9.long
USDA Economic Research Service. U.S. Beef and Cattle Industry: Background Statistics and Information http://www.ers.usda.gov/news/BSECoverage.htm