@article{198915,
      recid = {198915},
      author = {Sidder, Gary B.},
      title = {Industrial minerals -- today and tomorrow the raw  materials to build the upper Midwest / [microform] :},
      publisher = {U.S. Geological Survey :},
      address = {Denver, CO :},
      pages = {144 p. :},
      year = {1992},
      note = {Cover title.},
      url = {http://library.usi.edu/record/198915},
}