@article{200125,
      note = {Cover title.},
      author = {McKelvey, G. E.},
      url = {http://library.usi.edu/record/200125},
      title = {Gold deposits along the Río Madera, northern Bolivia  [microform] /},
      publisher = {U.S. Dept. of the Interior, Geological Survey ;},
      recid = {200125},
      pages = {1 v. (various pagings) :},
      address = {[Reston, VA] :},
      year = {1991},
}