Severn Tunnel
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Vernon-Harcourt, Leveson Francis (1895): Brief Notices of Works. Portland Harbour; The Severn Tunnel; The Forth Bridge; The River Clyde; The River Tyne; The Tower Bridge.. Dans: Minutes of the Proceedings of the Institution of Civil Engineers, v. 121, n. 1895-3 ( 1895), pp. 303-323.
https://doi.org/10.1680/imotp.1895.19761
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Carpmael, R. (1932): Cementation in the Severn Tunnel. Dans: Minutes of the Proceedings of the Institution of Civil Engineers, v. 234, n. 1932-2 ( 1932), pp. 277-289.
https://doi.org/10.1680/imotp.1932.13312
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Walker, Thomas A. (1891): The Severn tunnel: its construction and difficulties, 1872-1887. 3ème édition, Bentley.
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Haswell, C. K. (1973): Tunnel under the Severn and Wye Estuaries. Dans: Proceedings of the Institution of Civil Engineers, v. 54, n. 3 (août 1973), pp. 451-486.
https://doi.org/10.1680/iicep.1973.4855