1. Curso de yacimientos minerales metálicos, tipos genéticos;Ariosa,1977
2. Techniques of gilding and surface enrichment in pre-Hispanic American metallurgy;Bray,1993
3. Metallurgy and anthropology: two studies from prehispanic America;Bray;Boletin Museo del Oro,1997
4. Primer adorno corporal de oro (nariguera) en la arqueologia indoantillana;Chanlatte Baik,1977
5. Early Metal Mining and Production;Craddock,1995