@article{220104,
      note = {Relief shown by contours.},
      author = {Orndorff, Randall C.},
      url = {http://library.usi.edu/record/220104},
      title = {Geologic map of the Muddy Creek drainage basin within the  Singers Glen quadrangle, Rockingham County, Virginia /},
      publisher = {The Survey,},
      recid = {220104},
      pages = {1 map :},
      address = {[Reston, Va.?] :},
      year = {1995},
}