Central Intelligence Agency
Cia: World Factbook: Chad
This is a great resource for general information on Chad in the Sahel region of Africa. It includes geography, population, natural resources, government, economy, communications, transportation, military, and transnational issues.
Encyclopedia of Earth
Encyclopedia of Earth: Chad
Facts about Chad including environmental issues, geography, government, people, water, economy, agriculture, health, natural resources, energy use, and conflict.