Scale approximately 1:5,100,000 (W 124°56ʹ00ʺ--W 84°52ʹ00ʺ/N 49°01ʹ00ʺ--N 25°47ʹ00ʺ).
Note
Covers the United States west of the Mississippi River and Wisconsin, Illinois, Indiana, Mississippi, Alabama, and western Kentucky and Tennessee. "January 1974." "Map no. X-D-4164." Includes inset of Alaska.
