Chas. F. Jackson and J.H. Hedges books & textbook
Metal-Mining Practice: United States Department of the Interior Bulletin 419
Jackson, Chas. F.; Hedges, J. H.
United States Government Printing Office /1939T Paperback
Metal-Mining Practice Bulletin 419
Chas. F. Jackson and J.H. Hedges
GAO /1939T Paperback / 512 Pages
