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/

Building a Bridge  
   The story of the rebuilding of a bridge over the Blyth between Heveningham and Ubbeston in 1794.
   http://www.blythweb.co.uk/blythburgh/1794bridge.htm

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

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/