Scale approximately 1:620,000 (W 111°40ʹ17ʺ--W 103°12ʹ11ʺ/N 45°00ʹ20ʺ--N 40°54ʹ38ʺ).
Note:
Relief shown by hachures. "Edition no. 1349." "Population of 450 and over according to official estimates as of July 1, 1939." Stamped on: Oct 14, 1939. Includes index to national parks, monuments, etc., township diagram, indexes to counties and towns, list of cities with populations greater than 450 people, and notes. "NPCR 539."