@article{13933,
      author = {Parker, Albert D.},
      url = {http://library.usi.edu/record/13933},
      title = {Planning and estimating underground construction},
      publisher = {McGraw-Hill},
      recid = {13933},
      pages = {xvi, 300 p.},
      address = {New York,},
      year = {1970},
}