United States: [with] Section across the United States on the 38th parallel of north latitude.

Map shows state and territorial boundaries, major cities, and regional boundaries of New England, Central states, Southern states, Middle Atlantic states, and Pacific states and territories; notable mountain ranges, rivers, and lakes; Indian, Washington, Montana, Idaho, Utah, Arizona, and Dakota territories; [Yellowstone] National Park; profile relief of the United States along the 38th parallel line of latitude on inset. Includes color key to regions. Inset: "Section across the United States on the 38th parallel of north latitude." Relief shown by hachures and in profile on inset. Scale [ca. 1:18,057,600]