A numerical investigation of the retaining walls of the Bell Common Tunnel by Potts, D. M.

Ground movements caused by tunnelling in loose fill

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Tunnel engineering handbook by Bickel, John O.

Tunnels planning, design, construction. Vol. 2 by Megaw, T. M.

Ground movements caused by deep trench construction in an urban area by Toombs, A. F.

Tunnel engineering handbook by Bickel, John O.

Handbook of mining and tunnelling machinery by Stack, Barbara

Tunnels planning, design, construction by Megaw, T. M.

A linear rock cutting rig by Snowdon, R. A.

Reproducibility of joint spacing measurements in rock by Ewan, V. J.