660a 1958 Nor The National Geographic Society. Atlas plate 9. North Central United States. Compiled and drawn... for The National Geographic Magazine... Washington, D.C., The National Geographic Society, 1958. Color. 1:2.851.200. 63 x 48 cm. Proyección cónica de Albers, áreas iguales. Paralelos tangentes: 38o. 30' y 47o. 30' N. (Atlas plate 9).