@article{233933,
      note = {"Pittsburgh, PA and Spokane, WA Research Centers."},
      author = {Mark, Christopher. and Tuchman, Robert J.},
      url = {http://library.usi.edu/record/233933},
      title = {Proceedings, new technology for ground control in retreat  mining [microform] /},
      publisher = {U.S. Dept. of Health and Human Services, Public Health  Service, Centers for Disease Control and Prevention,  National Institute for Occupational Safety and Health,},
      recid = {233933},
      pages = {126 p. :},
      address = {[Atlanta, Ga.?] :},
      year = {1997},
}