//-->
Mansfeld : Gedenkschrift zum 725jährigen Bestehen des Mansfeld-Konzerns 1200 - 1925
Hoffmann, Walter, (1925)
Copper : its geology and economics
Bowen, Robert, (1977)
The conquest of Copper mountain
Wilson, Forbes, (1981)
Copper, cobalt, nickel and manganese availability from land-based endowments : a perspective
Barsotti, Aldo F., (1984)
Copper availability, market economy countries : a minerals availability program appraisal
Rosenkranz, Rodney D., (1983)
Sorting out materials issues
Fraser, Sam J., (1988)