Ground supports for tunnels in weak rocks / W.H. Ward.
Ward, W.H.
Ground supports for tunnels in weak rocks / W.H. Ward. - Watford [Inglaterra] : BRE - [38] p. - Current papers ; 81 / Building Research Establishment .
Ground supports for tunnels in weak rocks / W.H. Ward. - Watford [Inglaterra] : BRE - [38] p. - Current papers ; 81 / Building Research Establishment .