@article{114084,
      author = {Kolata, Dennis R. and Frost, Joyce K. and Huff, Warren  D.,},
      url = {http://library.usi.edu/record/114084},
      title = {K-bentonites of the Ordovician Decorah Subgroup, Upper  Mississippi Valley : correlation by chemical fingerprinting  /},
      publisher = {Illinois State Geological Survey,},
      recid = {114084},
      pages = {30 p. :},
      address = {Champaign, IL :},
      year = {1986},
}