@article{197028,
      recid = {197028},
      author = {Burton, William C.},
      title = {Preliminary bedrock geologic map of the Wightman 7.5'  quadrangle, Virginia [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      address = {[Reston, VA] :},
      pages = {9 leaves :},
      year = {1994},
      note = {Distributed to depository libraries in microfiche.},
      url = {http://library.usi.edu/record/197028},
}