@article{257549,
      author = {Darnell, Victor.},
      url = {http://library.usi.edu/record/257549},
      title = {A directory of American bridge-building companies,  1840-1900 /},
      publisher = {Society for Industrial Archeology,},
      recid = {257549},
      pages = {x, 110 p. :},
      address = {Washington, D.C. (Room 5020, National Museum of American  History, Smithsonian Institution, Washington 20560) :},
      year = {1984},
}