@article{134416,
      recid = {134416},
      author = {Edwards, C. A.},
      title = {Sustainable agricultural systems /},
      publisher = {Soil and Water Conservation Society,},
      address = {Ankeny, Iowa :},
      pages = {xvi, 696 p. :},
      year = {1990},
      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://library.usi.edu/record/134416},
}