@article{226540,
      note = {Includes index.},
      author = {Robinson, Charles Sherwood, and Warner, Lawrence Allen,  and Wahlstrom, Ernest E.},
      url = {http://library.usi.edu/record/226540},
      title = {General geology of the Harold D. Roberts Tunnel, Colorado  /},
      publisher = {U.S. Govt. Print. Off.,},
      recid = {226540},
      pages = {iv, 48 p. :},
      address = {Washington :},
      year = {1974},
}