Primary Source: José de Acosta, "Historia natural y moral de las Indias" Libro 6, capítulos 4-10, 1590
1590 edition, Benson Latin American Collection: LAC-ZZ Rare Books, GZZ 980.6 AC72H, http://catalog.lib.utexas.edu/record=b3128596~S10
1894 reprint, University of California Libraries, https://archive.org/details/historianatural02acosrich
