@article{200534,
      note = {Cover title.},
      author = {Cathrall, John B.},
      url = {http://library.usi.edu/record/200534},
      title = {Platinum group elements in native gold, alluvium  concentrates, and mineralized rock concentrates from some  gold mining districts of Alaska [microform] /},
      publisher = {U.S. Dept. of Interior, Geological Survey :},
      recid = {200534},
      pages = {36 leaves :},
      address = {[Denver, CO] :},
      year = {1991},
}