Statistics of mines and mining in the states and territories west of the Rocky Mountains, for the year 1870 ([United States] 42d Congress, 1st session. House of Representatives ; Ex. doc. no. 10)
Statistics of mines and mining in the states and territories west of the Rocky Mountains, for the year 1870
([United States] 42d Congress, 1st session. House of Representatives ; Ex. doc. no. 10)