The National Geographic Magazine, Volume 57, Number 6 (June 1930).
Softcover, Washington, D.C. National Geographic Society, 1930. Good with No dust jacket as issued.
Softcover, Washington, D.C. National Geographic Society, 1930. Good with No dust jacket as issued.
Softcover, Washington, D.C. National Geographic Society, 1933. Good with No dust jacket as issued.
Soft Cover, Washington: National Geographic Society, 1918. Poor with no dust jacket.