Schele, Linda and Peter Matthews. The Code of Kings. William Morrow & CO. 1998

                 Schele, Linda and David Freide. A Forest of Kings. William Morrow & CO. 1990

                 Hagen, Von. Maya Land of The Turkey and The Deer. World Pub. Cleveland and New York.1960

                 Baquedano, Elizabeth. Aztec, Inca & Maya. Alfred A. Knopf and New York. 1998

                 Brennah, Martin, 1942- The Hidden Maya . Bear & CO. Pub. Santa Fe, New Mexico. 1998

                 The World Book Encyclopedia "Maya" p.323 1990 Edition.