helena valley northwest - map search

Topographic map 055249 of scale 1:63 000

English - US Geological Survey - 1950 - 10Mb -

Topographic map 322328 of scale 1:250 000

English - US Geological Survey - 1893 - 4Mb -

Topographic map 396086 of scale 1:63 000

English - US Geological Survey - 1899 - 5Mb -