| Reference | {Deposit:: Guiteras, J. R., 1940, Mining and milling methods and costs in the Alma district, Colorado: U.S. Bureau of Mines Information Circular 7101, 63 p.}{Development:: Patton, H. B., Hoskin, A. J., and Butler, G. M., 1912, Geology and ore deposits of the Alma district, Park County, Colorado: Colorado Geological Survey Bulletin 3, 284 p.}{Development:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}{Location:: USGS ALMA QUAD} |