Thompson 1966, p.30. Thompson, J. Eric S. (1966). "The Maya Central Area at the Spanish Conquest and Later: A Problem in Demography". Proceedings of the Royal Anthropological Institute of Great Britain and Ireland (1966). Royal Anthropological Institute of Great Britain and Ireland: 23–37. doi:10.2307/3031712. JSTOR3031712.
Thompson 1966, p.29; Caso Barrera & Aliphat 2007, p.53. Thompson, J. Eric S. (1966). "The Maya Central Area at the Spanish Conquest and Later: A Problem in Demography". Proceedings of the Royal Anthropological Institute of Great Britain and Ireland (1966). Royal Anthropological Institute of Great Britain and Ireland: 23–37. doi:10.2307/3031712. JSTOR3031712.
Thompson 1966, p.30. Thompson, J. Eric S. (1966). "The Maya Central Area at the Spanish Conquest and Later: A Problem in Demography". Proceedings of the Royal Anthropological Institute of Great Britain and Ireland (1966). Royal Anthropological Institute of Great Britain and Ireland: 23–37. doi:10.2307/3031712. JSTOR3031712.
Thompson 1966, p.29; Caso Barrera & Aliphat 2007, p.53. Thompson, J. Eric S. (1966). "The Maya Central Area at the Spanish Conquest and Later: A Problem in Demography". Proceedings of the Royal Anthropological Institute of Great Britain and Ireland (1966). Royal Anthropological Institute of Great Britain and Ireland: 23–37. doi:10.2307/3031712. JSTOR3031712.