@article{199991,
      note = {Distributed to depository libraries in microfiche.},
      author = {Peacock, Thomas R.},
      url = {http://library.usi.edu/record/199991},
      title = {The preparation of plant material and determination of  weight percent ash [microform] /},
      publisher = {U.S. Dept. of the Interior, Geological Survey :},
      recid = {199991},
      pages = {9 leaves :},
      address = {[Denver, CO] :},
      year = {1992},
}