Productivity and technology in the metallurgical industries : proceedings of the International Symposium on Productivity and Technology in the Metallurgical Industries, co-sponsored by the Minerals, Metals & Materials Society and Gesellschaft Deutscher Metallhutten-und Bergleute, held in Cologne, West Germany, September 17-22, 1989. - Koch, Michael; Taylor, John C. (The Minerals,Metals & Materials Society, 1989)