"Pyritic Smelting at Deadwood: A Temporary Solution to Refractory Ores"https://www.sdhspress.com/journal/south-dakota-history-15-4/pyritic-smelting-at-deadwood-a-temporary-solution-to-refractory-oreshttps://www.sdhspress.com/@@site-logo/sdshp-logo.jpg
"Pyritic Smelting at Deadwood: A Temporary Solution to Refractory Ores"