@article{199643,
      note = {"91-621-B is diskette version."},
      author = {Bullock, John H.},
      url = {http://library.usi.edu/record/199643},
      title = {Analytical results of insoluble-residue samples from the  Paducah 1° x 2° quadrangle, Missouri, Illinois, and  Kentucky, drill holes nos. I18 - I29 (excluding I23)  [microform] /},
      publisher = {U.S. Dept. of the Interior, Geological Survey :},
      recid = {199643},
      pages = {134 leaves :},
      address = {[Denver, CO] :},
      year = {1991},
}