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Report of a reconnaissance from Carroll Montana Territoryon the upper Missouri to the Yellowstone national park and return made in the summer of 1875BookPublished 1876
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by Allison, Ira S. (Ira Shimmin), 1895-1990
Published 1966 -
Report of the Geological exploration of the fortieth parallel made by order of the Secretary of War according to the acts of Congress of March 2 1867 and March 3 1869under the direction of A A Humphreys chief of engineersConference Proceeding BookPublished 1870