Pedro de, active 16th century Castañeda de Nájera

• Spanish Explorers in the Southern United States, 1528-1543. The Narrative of Alvar Nunez Cabeca de Vaca. The Narrative of the Expedition of Hernando De Soto by the Gentleman of Elvas
• The Coronado Expedition, 1540-1542. Excerpted from the Fourteenth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1892-1893, Part 1.