@article{198461,
      recid = {198461},
      author = {Kolpin, Dana W. and Burkart, M. R. and Thurman, E. M.},
      title = {Hydrogeologic, water-quality, and land-use data for the  reconnaissance of herbicides and nitrate in near-surface  aquifers of the midcontinental United States, 1991  [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      address = {Iowa City, Iowa :},
      pages = {iv, 61 p. :},
      year = {1993},
      note = {Chiefly tables.},
      url = {http://library.usi.edu/record/198461},
}