. . . . . . . . . . . . . "Econometric model of the United States copper an aluminum industries" . . . . . "An econometric model of the U.S. copper and aluminum industries : how cost changes affect substitution and recycling" . . . "An econometric model of the U.S. copper and aluminum industries how cost changes affect substitution and recycling"@en . "An econometric model of the U.S. copper and aluminum industries how cost changes affect substitution and recycling" . . . . "Ökonometrisches Modell." . . "Kupferindustrie." . . . . "Aluminiumindustrie." . . "USA." . .