Chad
Links
The rise of organisational complexity in mid-first millennium BC Chad Basin
http://antiquity.ac.uk/ProjGall/magnavita/index.html
Research carried out since the early 1990s on Neolithic settlements in the Nigerian part of the Chad Basin has provided new information on early, large (>10 ha), nucleated village settlements in West Africa. Antiquity Vol 78 No 301 September 2004.