@article{200487,
      note = {Distributed to depository libraries in microfiche.},
      author = {Yerkes, R. F., and Showalter, Patrick K.},
      url = {http://library.usi.edu/record/200487},
      title = {Preliminary geologic map of the Thousand Oaks 7.5ʹ  quadrangle, southern California [microform] /},
      publisher = {U.S. Geological Survey ;},
      recid = {200487},
      pages = {10 leaves :},
      address = {Menlo Park, CA :},
      year = {1991},
}