Allerton Conference on Agriculture and Environmental Quality (2nd : 1971 : Monticello, Ill.) 4n
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Allerton Conference on Agriculture and Environmental Quality (2nd : 1971 : Monticello, Ill.) 4n; Environmental quality and agriculture, what are the options? proceedings of the second Allerton conference, December 1971. : Council on Environmental Quality, University of Illinois at Urbana-Champaign
