@article{123061,
      note = {"Originally published September 1986... by Southern  Illinois University at Carbondale... for the Bureau of  Mines."},
      author = {Chugh, Yoginder P.},
      url = {http://library.usi.edu/record/123061},
      title = {In situ strength characteristics of coal mine floor strata  in Illinois /},
      publisher = {Illinois State Geological Survey,},
      recid = {123061},
      pages = {160 p. :},
      address = {Champaign, Ill. :},
      year = {1988},
}