@article{219602,
      note = {Potentiometric contours.},
      url = {http://library.usi.edu/record/219602},
      title = {Potentiometric surface of the Brightseat-upper Potomac  Aquifer in Virginia [microform] /},
      publisher = {The Survey ;},
      recid = {219602},
      pages = {maps ;},
      address = {Richmond, Va. :},
}