1. The population of Central Mexico in the sixteenth century;Cook;Ibero Americana,1948
2. [2] Clavijero, F.J. Historia Antigua de Mexico. 4 1945, Ed. Porrua, México City, pp. 123.
3. [3] Gibson, C. The Aztecs under Spanish Rule. A History of the Indians of the Valley of Mexico, 1964, Stanford University Press, Stanford, 593 pp.
4. The rate of population change in Central México 1550â1570;Cook;Hispanic Am. Hist. Rev.,1957
5. [5] Gerhard, P. GeografÃa Histórica de la Nueva España 1519â1821, 1986, Universidad Nacional Autónoma de Mexico, Mexico City, 412 pp.