General highway and transportation map, Powell County, Montana
Montana. Highway Department.
Date (Unknown or estimated)
Base map 1936. Approved 1938. Population based on 1940 census.
MHS Call Number
Roads--Montana--Powell County--Maps.; Powell County (Mont.)--Maps.; Powell County (Mont.)--Road maps.
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Montana. State Highway Commission. Planning Survey Section.; United States. Bureau of Public Roads.
Montana Historical Society Research Center
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