@article{196686,
      note = {Cover title.},
      author = {Helley, Edward J.},
      url = {http://library.usi.edu/record/196686},
      title = {Preliminary Quaternary geologic maps of Santa Clara  Valley, Santa Clara, Alameda, and San Mateo counties,  California a digital database / [microform] :},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      recid = {196686},
      pages = {8 leaves :},
      address = {[Menlo Park, Calif.?] :},
      year = {1994},
}