Archaeologists estimate the population of Uaxactún as 20,000 and those of Copán, Chichén Itzá and Uxmal at 200,000 people.
Public Broadcasting System of the USA,
http://www.pbs.org/wgbh/nova/maya/worl_sans1.html#map,
(accessed 28 January 2004)
Rivet, P. (1960) Maya Cities. Translated from the French by M. and L. Kochan. Paul Elek, London.