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, 1931. Good with No dust jacket as issued.