Stanley L. Korzeb and Kaleb C. Scarberry with the Montana Bureau of Mines and Geology and Jarred L. Zimmerman of Broadway Gold Mining have published a study of the Emery mining district in Powell County: Interpretations and Genesis of Cretaceous Age Veins and Exploration Potential for the Emery Mining District, Powell County, Montana. The report is available here: http://www.mbmg.mtech.edu/mbmgcat/public/ListCitation.asp?pub_id=31987&.