Includes some topography, exploration trails of La Verendrye (1742-1743), Lewis and Clark (1805-1806), Larocque (1805), Fisk (1862ff.), and Ludlow (1875), the Bozeman and Mullan Roads, railroads, fur and military forts, battlefield and historical sites, mining discoveries and camps, towns and cities (with some dates of founding), gas and oil fields, hot springs, and counties--each including 1930 population and its ranking among all counties, year of creation, source of name, and county seat. Also includes numerous historical notes and some sketches. Marginal notes include the evolution of political jurisdiction, and the territorial and state governors. Inset maps include a key to county information and the original nine counties.
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