@article{199008,
      note = {Distributed to depository libraries in microfiche.},
      author = {Lanfear, Kenneth J.},
      url = {http://library.usi.edu/record/199008},
      title = {A data base of nitrate in ground-water samples from the  conterminous United States [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      recid = {199008},
      pages = {7 p. ;},
      address = {Reston, Va. :},
      year = {1992},
}