found: Work cat.: Oldright, G.L. Zinc smelting in the horizontal retort fired with natural gas, 1948.
found: OCLC WorldCat, Nov. 9, 2004:(titles: Zinc smelting from a chemical and thermodynamic view point; Opportunities for zinc smelting; Zinc smelting in the Middle West; Tests of lignite char as reduction fuel in the smelting of zinc ores)
found: McGraw-Hill dictionary of scientific and technical terms, 2003("Smelting - [metallurgy] - The heating of ore mixtures accompanied by a chemical change resulting in liquid metal")
