Search U.S. government technical reports digitized or harvested by TRAIL.
Control of sulfur oxide emissions in copper, lead, and zinc smelting
The economics of byproduct metals(in two parts). 2. Lead, zinc, uranium, rare-earth, iron, aluminum, titanium, and lithium systems / by Alfred Petrick, Jr., Harold J. Bennett, Karl E. Starch, and Robert C. Weisner.
Availability of U.S. primary lead resources, by Paul McIlroy [and others.