The National Geographic Magazine, Volume 77, Number 6 (June 1940).
Softcover, Washington, D.C. National Geographic Society, 1940. Good with No dust jacket as issued.
Softcover, Washington, D.C. National Geographic Society, 1940. Good with No dust jacket as issued.
Softcover, Washington: National Geographic Society, 1941. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1942. Very Good with No dust jacket as issued.