@article{871845,
      recid = {871845},
      title = {Geologic atlas of the United States : Fredericksburg  folio, Virginia-Maryland /},
      pages = {1 online resource (9 unnumbered pages) :},
      note = {Reproduction of the original from the American Antiquarian  Society.},
      url = {http://library.usi.edu/record/871845},
}