The National Geographic Magazine, Vol. 120, No. 6 (December, 1961).
Soft Cover, Washington: National Geographic Society, 1961. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1961. Good with no dust jacket.
Softcover, Kirksville, Missouri: SIxteenth Century Studies Journal Publishers, 1987. Good with No dust jacket as issued.
Soft Cover, Tübingen: Max Niemeyer Verlag, 1980. Good with no dust jacket.