World University Agriculture School: Difference between revisions
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[http://www.ns.umich.edu/htdocs/releases/story.php?id=5936 Organic farming can feed the world, U-M study shows], University of Michigan, 2007
[http://www.nal.usda.gov/afsic/pubs/ofp/ofp.shtml Organic Production and Organic Food: Information Access Tools
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