Bridge Signs Douglas Coulter's collection of bridge maker's plates from wrought iron bridges of Illinois. Also features photographs of covered and iron bridges, and bridge postcards. http://www.douglascoulter.com/BridgeSigns/
China Bridge Discover how China's Song dynasty during the eleventh and twelfth centuries used the high arch "rainbow bridge" to solve the problem of spanning a fast-moving river without impeding boat traffic. Nova online. http://www.pbs.org/wgbh/nova/lostempires/china/
Context for World Heritage Bridges Contextual essay with bridge design and construction dealt with chronologically by material and by type. Includes bibliography and list of potential World Heritage bridges. http://www.icomos.org/studies/bridges.htm
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