The National Geographic Magazine, Volume CXII, Number One (July, 1957).
Illustrated by Jack Potter (Coca Cola ad on back o. Soft Cover, Washington: National Geographic Society, 1957. Good with no dust jacket.
Illustrated by Jack Potter (Coca Cola ad on back o. Soft Cover, Washington: National Geographic Society, 1957. Good with no dust jacket.
Soft Cover, Durham, NC: Environmental History, 2002. Very Good with no dust jacket.