Hammond, George P. and Rey, Apapito, The Rediscovery of New Mexico, 1580-1594, Albuquerque: U of NM Press, 1966, 297; Flint, Richard and Flint, Shirley Cushing, "Juan Morlete, Gaspar Castano de Sosa, and the Province of Nuevo León." "New Mexico Office of the State Historian : Castaņo de Sosa, Gaspar". Archived from the original on 2012-03-09. Retrieved 2011-01-26., accessed Dec 19, 2010
web.archive.org
Hammond, George P. and Rey, Apapito, The Rediscovery of New Mexico, 1580-1594, Albuquerque: U of NM Press, 1966, 297; Flint, Richard and Flint, Shirley Cushing, "Juan Morlete, Gaspar Castano de Sosa, and the Province of Nuevo León." "New Mexico Office of the State Historian : Castaņo de Sosa, Gaspar". Archived from the original on 2012-03-09. Retrieved 2011-01-26., accessed Dec 19, 2010
