Referência ULLOA, Antonio de; JUAN, Jorge. A VOYAGE TO SOUTH AMERICA: DESCRIBING AT LARGE THE SPANISH CITIES, TOWNS, PROVINCES, ETC. ON THAT EXTENSIVE CONTINENT: INTERSPERSED THROUGHOUT WITH REFLECTIONS ON THE GENIUS, CUSTOMS, MANNERS, AND TRADE OF THE INHABITANTS; TOGETHER WITH THE NATURL HISTORY OF THE COUNTRY, AND AN ACCOUNT OF THEIR GOLD AND SILVER MINES. Londres, Inglaterra: L. Davis and C. Reymers, 1758.