The United States Geological Survey in Alaska: Organization and Status of Programs in 1977 Geological Survey Circular 751-A
Arlington, VA: US Geological Survey, 1977. softcover. More
Arlington, VA: US Geological Survey, 1977. softcover. More
Washington, D. C. U. S. Department of the Interior, 1977. softcover. Geological Survey Circular 751-B. Brief writing on back cover. Interior pages clean and bright. More