Scale approximately 1:145,000 (W 108°55ʹ00ʺ--W 107°27ʹ00ʺ/N 46°29ʹ00ʺ--N 45°27ʹ00ʺ).
Note
Relief shown by hachures and spot heights. Title from panel. Indexed. Includes indexes to four types of highways, location maps, map of Billings, 9 inset city maps, adjoining map sections diagrams, and advertisements.