Berlin Iron Bridge Company Content:Fabricator of metal-truss bridges in the 19th century. Features history, the Company's patented lenticular truss, and list of remaining Berlin bridges in Connecticut.
Digital Bridges Content:Bridges of the Nineteenth Century : A Twenty-First Century Book Collection
King Bridges in New York State Content:Article by Allan King Sloan on the preservation of the remaining examples of these bridges within the state. Also includes a history of the Company.