@article{12963,
      recid = {12963},
      author = {Wallhagen, Robert E.},
      title = {Development of optimized diffuser and spray fan systems  for coal mine face ventilation : final report /},
      publisher = {The Associates,},
      address = {Waltham, Mass. :},
      pages = {256 p. :},
      year = {1977},
      note = {"Author: Robert E. Wallhagen."},
      url = {http://library.usi.edu/record/12963},
}