"Caddoan TreeArchived 2016-03-04 at the Wayback Machine", Texas Beyond History website, accessed 30 May 2011; Schleser, Karl H. Plains Indians, A.D. 500 to 1500: The Archaeological Past of Historic Groups. Norman: U of OK Press, 1994, pp. 147-148
"Caddoan TreeArchived 2016-03-04 at the Wayback Machine", Texas Beyond History website, accessed 30 May 2011; Schleser, Karl H. Plains Indians, A.D. 500 to 1500: The Archaeological Past of Historic Groups. Norman: U of OK Press, 1994, pp. 147-148