Crossroads of the Natural World.
Hardcover, Chapel Hill, N.C. University of North Carolina Press, 2013. First Edition; First Printing. Very Good+ in Very Good+ dust jacket.
Hardcover, Chapel Hill, N.C. University of North Carolina Press, 2013. First Edition; First Printing. Very Good+ in Very Good+ dust jacket.
Softcover, Washington, D.C. National Geographic Society, 1932. Good with No dust jacket as issued.
Soft Cover, Washington: National Geographic Society, 1954. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1951. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1946. Fair with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1946. Good with no dust jacket.
Softcover, Washington, D.C. National Geographic Society, 1935. Good with No dust jacket as issued.
Soft Cover, Washington: National Geographic Society, 1953. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1949. Very Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1947. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1944. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1957. Very Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1957. Very Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1958. Very Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1958. Very 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, Washington: National Geographic Society, 1959. Good with no dust jacket.
Illustrated by H. J. Soulen, Peter V. Bianchi. Soft Cover, Washington: National Geographic Society, 1960. Good with no dust jacket.
Soft Cover, Washington, D.C. National Geographic Society, 1958. Good with no dust jacket.
Soft Cover, Washington, D.C. National Geographic Society, 1958. Very Good with no dust jacket.
Soft Cover, Washington, D.C. National Geographic Society, 1958. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1959. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1957. Good with no dust jacket.
Soft Cover, Washington: National Geographic Society, 1964. Very Good with no dust jacket.
Soft Cover, Washington, D.C. National Geographic Society, 1958. Good with no dust jacket.