@article{199715,
      note = {Distributed to depository libraries in microfiche.},
      author = {Duwelius, Richard F. and Watson, Lee R.},
      url = {http://library.usi.edu/record/199715},
      title = {Ground-water levels and directions of flow in the vicinity  of a well field, Elkhart, Indiana, December 1989  [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      recid = {199715},
      pages = {iv, 24 p. :},
      address = {Indianapolis, Ind. :},
      year = {1992},
}