Montana, Helena special map

Relief shown by contours and spot heights. Text and legend of "conventional signs" on verso. "Surveyed in 1897-98."

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Bibliographic Details
Main Authors: Douglas, Edward Morehouse, 1855-1932, Geological Survey (U.S.)
Format: Image
Language:English
Subjects:
Helena (Mont.)
Helena Region (Mont.)
Online Access:Request full text
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Description
Summary:Relief shown by contours and spot heights. Text and legend of "conventional signs" on verso. "Surveyed in 1897-98."