Downie, Walter G (June 15, 2010). "Terrell County Texas". Handbook of Texas Online. Texas State Historical Association. Retrieved December 14, 2010.
Johnson, John G (June 12, 2010). "José de Berroterán". Handbook of Texas Online. Texas State Historical Association. Retrieved December 14, 2010.
Garcia, Clotide P (June 15, 2010). "Blas María de la Garza Falcón". Handbook of Texas Online. Texas State Historical Association. Retrieved December 14, 2010.
Cutrer, Thomas W (June 15, 2010). "Samuel Highsmith". Handbook of Texas Online. Texas State Historical Association. Retrieved December 14, 2010.
Wagner, Frank (June 15, 2010). "Nathaniel Michler". Handbook of Texas Online. Texas State Historical Association. Retrieved December 14, 2010.
Faulk, Odie B; Emmett, Chris (June 12, 2010). "Camels". Handbook of Texas Online. Texas State Historical Association. Retrieved December 14, 2010.