@book{14869,
	author = {Edwards, C. A. and United States.},
	title = {Sustainable agricultural systems /},
	publisher = {Soil and Water Conservation Society,},
	year = {c1990.},
	address = {Ankeny, Iowa :},
	note = {"Proceedings of the International Conference on Sustainable Agricultural Systems that was held at Ohio State University, Columbus, Ohio, in September 1988 ... [under the] sponsorship of USAID ... [et al.]"--P. xiv.},
	url = {http://www.loc.gov/catdir/enhancements/fy0744/89026370-d.html}
}