00754cam a2200169K  4500082001600000100002700016245009200043250001200135260003800147300006600185490005500251500011800306526003700424650000800461650005500469856006000524  a623.68bWAL1 aWalker, Thomas Andrew,14aThe Severn tunnelbits construction and difficulties, 1872-1887 /cby Thomas A. Walker.  a2nd ed.  aLondon :bR. Bentley & Son,c1890  a1 online resource (xxi, 188 p.) :bill., ports., maps, plans.1 aThe making of the modern world. Part 2 (1851-1914)  aReproduction from the The Goldsmiths' Library of Economic Literature, Senate House Library, University of London.  a0b0c0d623_680000000000000_WAL 0aMCE 0aRailroad tunnelszSevern River (Wales and England)40uhttp://www.columbia.edu/cgi-bin/cul/resolve?clio9689726