@article{220202,
      author = {Risch, Martin R. and Cohen, David A.},
      url = {http://library.usi.edu/record/220202},
      title = {A computerized data base of nitrate concentrations in  Indiana ground water /},
      publisher = {U.S. Geological Survey ;},
      recid = {220202},
      pages = {iv, 17 p. :},
      address = {Indianapolis, Ind. :},
      year = {1995},
}