Tlaxcala
- Images and description of lithographed atlas map, 1858.
- http://www.davidrumsey.com/maps2930.html

World Institute for Conservation and Environment
- Birdlist and links to habitat information.
- http://www.birdlist.org/nam/mexico/tlaxcala/tlaxcala.htm

Lienzo de Tlaxcala
- Colorplate reproductions and descriptions of Tlaxcalan drawings of the Spanish conquest, completed before 1560.
- http://bancroft.berkeley.edu/Exhibits/nativeamericans/25.html

Social Structure and Kinship in Rural Mexico
- Academic study of kinship and compadre relationshps.
- http://eclectic.ss.uci.edu/~drwhite/tlaxcala/