Paris. (Иллюстрации Вальдека) Brunhouse, Robert L. 1973: In Search of the Maya: The First Archaeologists. University of New Mexico Press. Albuqueque. (Вальдеку
Book Publishing, 1999. — 322 p. — ISBN 0892133252. Richard L. Thompson. Maya: The World as Virtual Reality. — 1st ed. — Alachua, FL: Govardhan Hill Publishing