@article{1391694,
      author = {Johnson, Mark and Oginski, Shemek,},
      url = {http://library.usi.edu/record/1391694},
      title = {Rapid Excavation and Tunneling Conference 2015 proceedings  /. Rapid Excavation and Tunneling Conference},
      recid = {1391694},
      pages = {1 online resource (1,410 pages) :},
}