See Albert Camarillo, Chicanos in a Changing Society: From Mexican Pueblos to American Barrios in Santa Barbara and Southern California, 1848-1930 (Cambridge, Mass.: Harvard University Press, 1979).

William Edward Evans, "The Garra Uprising: Conflict Between San Diego Indians and Settlers in 1851," California Historical Quarterly, vol. 45 (1966).

Leonard Pitt, The Decline of the Californios: A Social History of the Spanish-Speaking Californians, 1846-1890 (Berkeley, Los Angeles and London: University of California Press, 1966).

Charles Hughes, "The Decline of the Californios: The Case of San Diego, 1846-1856," Journal of San Diego History, XXI, no.3 (Summer 1975).

Mario T. Garcia, "The Californios and the Politics of Accommodation, 1846-1860," Aztlan: International Journal of Chicano Studies Research, 6, No.l 1 (Spring 1975).

http://www.sandiegohistory.org/collections/stereocards/stereocard.htm