CG-20 World Aeronautical Chart

Map of the central United States, or region "CG-20", showing cities, roads, and topographical features, as well as aeronautical and radio frequency symbols for flight navigation. Scale 1:1,000,000
Date: August 15, 1974
Creator: United States. Department of Commerce.
System: The Portal to Texas History

Denver Sectional Aeronautical Chart, 13th Edition

Aeronautical map of a four state region consisting of Utah, Arizona, New Mexico, and Colorado that shows cities, topographical features, ranch lands, national parks, and various aeronautical symbols for flight navigation. A large portion of Colorado and its cities make up most of the map. Scale 1:500,000.
Date: August 14, 1975
Creator: United States. Department of Commerce.
System: The Portal to Texas History