@article{200042,
      note = {Distributed to depository libraries in microfiche.},
      author = {Sidder, Gary B. and Mendoza S., Vicente.},
      url = {http://library.usi.edu/record/200042},
      title = {Geology of the Venezuelan Guayana Shield and its relation  to the entire Guayana Shield [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey :},
      recid = {200042},
      pages = {1 v.},
      address = {[Denver, CO] :},
      year = {1991},
}