@article{139932,
      recid = {139932},
      title = {Crushed stone and sand and gravel in the ... /},
      publisher = {U.S. Dept. of the Interior, Bureau of Mines,},
      address = {Washington, DC :},
      pages = {v. :},
      year = {1989},
      note = {Title from caption.},
      url = {http://library.usi.edu/record/139932},
}