Central America: MEXICO AND CENTRAL AMERICA. Compiled and Drawn in the Cartographic Section of the National Geographic Society for National Geographic Magazine, Gilbert Grosvenor, Editor. Albers Conical Equal-Area Projection. Scale 1:3,500,000 or 55.24 miles to the inch. Large folded coloured map, 900 by 650 mm; a very good copy. Washington; National Geographic Society; March, 1953.