Preliminary report of the United States Geological Survey of Montana, and portions of adjacent Territories : being a fifth annual report of progress [for the year 1871]

Final report of the United States Geological Survey of Nebraska and portions of the adjacent territories : made under the direction of the Commissioner of the General Land Office

Preliminary Report of the United States Geological Survey of Montana, and Portions of Adjacent Territories: Being a Fifth Annual Report of Progress [For the Year 1871]