Books by Denver Workshop on Expansive Clays and Shales in Highway Design and Construction:
Books in the extended shelves:
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Workshop on Expansive Clays and Shales in Highway Design and Construction, Denver, 1972: Proceedings. (Available from Supt. of Docs., Govt. Print. Off., and National Technical Information Service, Springfield, Va., 1973), also by Steven J Hanna, Donald Roy Lamb, and United States. Federal Highway Administration. Offices of Research and Development (page images at HathiTrust)
Find more by Denver Workshop on Expansive Clays and Shales in Highway Design and Construction at your library, or elsewhere.