J. archaeol. sci. rep. J. archaeol. sci. rep. Diverse strategies for copper production in Chalcolithic Iberia La Duc Elizabeth Montero-Ruiz Ignacio Freestone Ian C. Fanlo Loras Javier Jabalquinto Expósito Isabel María Martín de la Cruz José C. Pérez-Lambán Fernando Picazo Millán Jesús V. Universidad de Zaragoza Martinón-Torres Marcos 2022 research-article