World Tunnel Congress-2016 and the 42nd General Assembly of the International Tunneling and Underground Space Association were held in San Francisco, California (USA) from April 22 to April 28, 2016.
World Tunnel Congress-2016 and the 42nd General Assembly of the International Tunneling and Underground Space Association were held in San Francisco, California (USA) from April 22 to April 28, 2016.