The National Geographic Magazine, Volume 98, Number 4 (October, 1950).
Soft Cover, Washington: National Geographic Society, 1950. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1950. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1956. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1961. Good with no dust jacket.