Author

O. A. Hills

1 book found

Cover of Papers Read Before the Black Hills Mining Men's Association at Their Regular Monthly Meetings, on the Mining and Metallurgy of Black Hills Ores, Together with a Brief Outline of the Mining Industry of the Black Hills, and Some Statistics Relating to the O

Papers Read Before the Black Hills Mining Men's Association at Their Regular Monthly Meetings, on the Mining and Metallurgy of Black Hills Ores, Together with a Brief Outline of the Mining Industry of the Black Hills, and Some Statistics Relating to the O

Black Hills Mining Men's Association · First published 2023