This topographic street plan of Ndjamena, the capital of Chad, and Kousseri, its twin city in Cameroon, was published in 1976 by the General Staff of the Soviet Union.
The map is in the Russian language. It is printed in 9 colours, and is extremely detailed, with a contour interval of 10 metres. Buildings are classified by their function and material, roads by their width and material, and vegetation by its type. There is a short text which describes transport in and around the cities, places of importance, and infrastructure (factories, power stations, and hospitals); and indexes to streets and major buildings.
Ndjamena 1 
Ndjamena 2
More maps of Chad and Cameroon are available from TROPICARTA (requires Chomikuj account).