The National Geographic Magazine, Volume 60, Number 2 (August 1931).
Softcover, Washington, D.C. National Geographic Society, 1931. Good with No dust jacket as issued.
Softcover, Washington, D.C. National Geographic Society, 1931. Good with No dust jacket as issued.
Soft Cover, Washington: National Geographic Society, 1949. Very Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1956. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1950. Good with no dust jacket.