@article{157766,
      author = {Harper, Denver.},
      url = {http://library.usi.edu/record/157766},
      title = {Mine subsidence in Indiana /},
      recid = {157766},
      pages = {17 p. :},
      address = {Bloomington, Ind. : Dept. of Natural Resources, Geological  Survey,},
      year = {1982},
}