North American tunneling 2006 : proceedings of the North American tunneling conference 2006 ;10-15 June 2006, Chicago, USA /

Geahča maid

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  Dahkki: Proceedings of the North American Tunneling 2006 Conference (2006 : Chicago, USA), et al.
  Almmustuhtton: (2006)
• North American tunneling `96 : proceedings of the International Conference on North American Tunneling ' 96 and the 22nd. general assembly of the International Tunneling Association , Washington, DC, USA, 21-24 April 1996 /
  Dahkki: International Conference on North American Tunneling (22nd : 1996 : Washington, DC, USA), et al.
  Almmustuhtton: (1996)
• Tunnels and tunneling
  Almmustuhtton: (1969)
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  Dahkki: Clark, Liz, author
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