Proceedings of the second Pan American scientific congress : conservation of iron ore / by Leith, C. K.

Proceedings of the second Pan American scientific congress : iron ores of the Americas / by Leith, C. K.

Price prospects for major primary commodities by World Bank, Banco Mundial

Table of Contents: “…TABLA DE CONTENIDO: Preface -- Notes and definitions -- Commodity descriptions -- Summary -- Commodity markets in 1987-90 -- Global assumptions underlying the primary commodity forecasts -- Energy: Energy -- Petroleum -- Coal -- Metals and minerals: Copper -- Tin -- Nickel -- Aluminum and bauxite -- Iron ore -- Steel -- Lead and zinc -- Gold -- Silver.…”