1. The Future of Nonfuel Minerals;Tilton,1977
2. Instability in the copper, aluminum, tin and iron and steel markets;Powers;Materials and Society,1981
3. A note on the market instability in the metal industries;Campbell;Materials and Society,1985
4. Copper and its byproducts;Lonoff;Mining Engineering,1983
5. Supply and Competition in Minor Metals;Brooks,1965