http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Agriculture's role in environmental quality
proceedings of the first Allerton conference, December, 1970
University of Illinois at Urbana-Champaign
Sponsored by the Agricultural Experiment Station and the Council on Environmental Quality of the University of Illinois at Urbana-Champaign.
Special publication (University of Illinois at Urbana-Champaign. Agricultural Experiment Station) ; no. 21