Orozco, Cynthia E (June 15, 2010). "José Antonio de la Garza". Handbook of Texas Online. Texas State Historical Association. Retrieved December 17, 2010.
Holden, William Curry (June 15, 2010). "Square and Compass Ranch". Handbook of Texas Online. Texas State Historical Association. Retrieved December 17, 2010.
Pearce, William M (June 15, 2010). "Charles William Post". Handbook of Texas Online. Texas State Historical Association. Retrieved December 17, 2010.
Howard, Margaret Ann (June 12, 2010). "Cowhead Mesa". Handbook of Texas Online. Texas State Historical Association. Retrieved December 17, 2010.