JEFFERSON COUNTY COURTHOUSE RECORDS98000 TON SHIPPED IN 1890'S1919 TPD=30 TONSUSED AS FLUX FOR ASRCOIRON DEPOSITS IN MONT" MBMG IC-13BY V C DEMUNCK 1956METALIFEROUS DEP OF GREATER HELENMINING DIST" USGS B-842 19ORE DEPOSITS OF HELENA MINING RE-GION USGS B-527 1913USGS PROFESSIONAL PAPER-292