North east Nigeria 1:1,000,000.
Great Britain.Directorate of Overseas Surveys.
[Tolworth] : Directorate of Overseas Surveys,
1971.
Includes legend.
Shows roads (2 classes), tracks, railways, international boundaries.
To accompany: The land resources of north east Nigeria, Vol. 4: Present and potential land use.
Specialist information after A. Lesslie.