Date: [between 1881-1887]
Creator: A.J. Johnson & Co.
Description: Map shows the mineral resources and mining activity in Idaho, Montana and Wyoming, railroads, military outposts, areas of Indian habitation and reservations, historical routes of exploration, counties, and settlements in Nebraska, Dakota Territory, Idaho, Montana, and Wyoming, and Yellowstone "National Park" in Wyoming. Relief shown by hachures and spot heights. Scale [ca. 1:3,400,000].
Contributing Partner: University of Texas at Arlington Library