@article{691036,
      author = {Fowler, Matthew.},
      url = {http://library.usi.edu/record/691036},
      title = {North American Tunneling 2012 proceedings / [electronic  resource] :. North American Tunneling Conference},
      publisher = {Society for Mining, Metallurgy and Exploration,},
      recid = {691036},
      pages = {xii, 856 p. :},
      address = {Englewood, Colo. :},
      year = {2012},
}