Geology of the Eastern Part of the Harold D. Roberts Tunnel, Colorado Stations 690+00 to 1238+58 , Geological Survey Professional Paper, PP 831-D

by L. A. Warner, C. S. Robinsons

$15 · Offered by Crossroads Books

Washington: United States Government Printing Office, 1981. softcover, softcover text 31 pages, illustrated, 5 foldout maps, 11.25 tall. very good. Item #5565530 A description of the geology of and engineering practices used in driving the eastern part of the tunnel through a sequence of almost entirely Precambrian rocks. DR3.

• Binding: Softcover

Found via Rare Books Intel, a search across rare-book dealers, auction houses and marketplaces worldwide.