Tilton, John E.Hutchison, Roger S.2023-05-302023-05-301989https://hdl.handle.net/11124/177059Includes bibliographical references (pages 77-79).doctoral dissertationsengCopyright of the original work is retained by the author.Copper -- Industrial applicationsTelephone industry -- MaterialsCommunication and trafficTechnical change and the demand for copper in the U.S. telecommunications industryText