@article{226815,
      note = {Issued in a portfolio.},
      author = {Jorgensen, Donald G. and Helgesen, John O. and Imes,  Jeffrey L.},
      url = {http://library.usi.edu/record/226815},
      title = {Regional aquifers in Kansas, Nebraska, and parts of  Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South  Dakota, Texas, and Wyoming--geohydrologic framework /},
      publisher = {U.S. G.P.O. ;},
      recid = {226815},
      pages = {vii, 72 p. :},
      address = {Washington :},
      year = {1993},
}