North east Nigeria 1:1,000,000.
Great Britain.Directorate of Overseas Surveys.
Aitchison, Peter John.Land resources of north east Nigeria, Vol. 1: The environment
[Tolworth] : Directorate of Overseas Surveys,
1970.
Includes legend.
Shows roads (2 classes), tracks, railways, international boundaries.
Specialist information compiled by D.M. Carroll and K. Kinkenberg.
To accompany: The land resources of north east Nigeria, Vol. 1: The environment/ by P.J. Aitchison ... [et al.].
Soils