Books by International Association of Geophysical Contractors:
Books in the extended shelves:
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International Association of Geophysical Contractors: Providing needed information on the geology of the national forest system (U.S. Dept. of Agriculture, Forest Service ;, 1996), also by United States Forest Service (page images at HathiTrust)
Find more by International Association of Geophysical Contractors at your library, or elsewhere.