@article{68550,
      note = {"Reprinted from Proceedings of the Indiana Academy of  Science for 1969, vol. 79, 1970."},
      author = {Wier, Charles E.},
      url = {http://library.usi.edu/record/68550},
      title = {Factors affecting coal roof rock in Sullivan County,  Indiana /},
      publisher = {Dept. of Natural Resources, Indiana Geological Survey,},
      recid = {68550},
      pages = {p. 263-269 :},
      address = {Bloomington, Ind. :},
      year = {1970},
}