Oct 1920 n 489 p 426-430: Construction and methods adopted in Rogers Pass tunnel made by Canadian Pacific Railway in 1913-1915 in British Columbia, and at Twin Peaks tunnel, provided for new highway near San Francisco, Cal. n 490 Nov 1920 p 466-470: Construction of Pennsylvania Railroad tunnels in the city of New York.
Construction tunnels
Ry. Engr
Railway Engineer ; 41 , n 489-490 ; Various pages
1920
18 Figs.
Article (Journal)
English
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Track construction for railway tunnels
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