tunnel
BibliographySee T. M. Megaw and J. V. Bartlett, Tunnels (1981–82); B. Stack, Handbook of Mining and Tunnelling Machinery (1982); Approaching the 21st Century (1987). Sections in this article:
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved. More on tunnel Bibliography from Fact Monster:
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