@article{239429,
      recid = {239429},
      author = {Berkas, Wayne R.},
      title = {Occurrence, distribution, and concentration of  hydrocarbons in and near the Shell Valley Aquifer, North  Dakota [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      address = {Bismarck, N.D. :},
      pages = {iii, 20 p. :},
      year = {2000},
      note = {Shipping list no.: 2000-0887-M.},
      url = {http://library.usi.edu/record/239429},
}