[permaculture] [REVIEW] Back to the roots of crop farming: the work of Nikolai Vavilov

Douglas Woodard dwoodard at becon.org
Wed Dec 10 23:39:21 EST 2008


See
<http://www.nature.com/nature/journal/v456/n7223/full/456707a.html>

Doug Woodard
St. Catharines, Ontario, Canada




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