The National Geographic Magazine, Volume 112, Number 6 (December, 1957).
Soft Cover, Washington: National Geographic Society, 1957. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1957. Good with no dust jacket.
Softcover, Durham, N. C. Duke University, 1973. Very Good with No dust jacket as issued.
Softcover, Boulder, Colorado, U. S. A. University of Colorado, 1940. Good with No dust jacket as issued.