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Douglas, Edward Morehouse, 1855-1932
2
Geological Survey (U.S.)
2
Chapman, R. H. (Robert Hollister), 1868-1920
1
Gannett, Henry, 1846-1914
1
Lloyd, W. J. (Topographer)
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Maps of North America
2
place
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Helena Region (Mont.)
Deer Lodge County (Mont.)
1
Helena (Mont.)
1
Jefferson County (Mont.)
1
Lewis and Clark County (Mont.)
1
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Topographic maps
Maps
2
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U.S. Geological Survey
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Map Division
2
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cartographic
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: Helena Region (Mont.)
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Montana Helena sheet
Montana, Helena special map