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Tunnels
International Tunnelling Association
Encourages planning of the subsurface and promotes the use of tunnels.
http://www.ita-aites.org
PageRank: Not available
MrTunnel
Includes reports on major United States road tunnel projects.
http://www.mrtunnel.com
PageRank: Not available
Norwegian Tunnelling Technology
Covering history, projects, products, research, and development.
http://www.tunnel.no
PageRank: Not available
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