@article{233337,
      note = {Cover title.},
      author = {Wentworth, Carl M.},
      url = {http://library.usi.edu/record/233337},
      title = {General distribution of geologic materials in the San  Francisco Bay Region, California a digital map database /  [microform] :},
      publisher = {Dept. of the Interior, U.S. Geological Survey,},
      recid = {233337},
      pages = {26 p. :},
      address = {[Washington, D.C.?] :},
      year = {1997},
}