@article{219776,
      note = {Relief shown by contours.},
      author = {McManus, B. Craig.},
      url = {http://library.usi.edu/record/219776},
      title = {Altitude and configuration of the potentiometric surface  in part of lower Providence Township, Montgomery County,  Pennsylvania, May and June 1994 [microform] /},
      publisher = {The Survey ;},
      recid = {219776},
      pages = {1 map ;},
      address = {[Harrisburg, Pa.?] :},
      year = {1995},
}