@article{263388,
      recid = {263388},
      author = {Saad, David A. and Hippe, Daniel J.},
      title = {Large springs in the Valley and Ridge physiographic  province of Pennsylvania [microform] /},
      publisher = {Dept. of the Interior, U.S. Geological Survey ;},
      address = {Harrisburg, Pa. :},
      pages = {iv, 17 p. :},
      year = {1990},
      note = {"A contribution to the Appalachian Valleys--Piedmont  Regional Aquifer-System Analysis study"},
      url = {http://library.usi.edu/record/263388},
}