@article{200142,
      note = {Distributed to depository libraries in microfiche.},
      author = {Helley, Edward J. and Nakata, John K.},
      url = {http://library.usi.edu/record/200142},
      title = {Geological map of the Gilroy 7.5 minute quadrangle,  California [microform] /},
      publisher = {U.S. Geological Survey ;},
      recid = {200142},
      pages = {6, [4] leaves, :},
      address = {Menlo Park, CA. :},
      year = {1991},
}