Published by U. S. Department of the Interior, Washington, DC, 1949
Seller: Willis Monie-Books, ABAA, Cooperstown, NY, U.S.A.
Softcover. Condition: Very Good-. Light crease to front cover. Owner's name ink stamped on upper margin of front cover. ; U. S. Geological Survey Circular 20. With folded maps and plates. ; 211 pages.