Lower Niger survey appraisal mission /
Great Britain.Directorate of Overseas Surveys.
[Tolworth] : Directorate of Overseas Surveys,
1973.
Loose maps only, wanting report.
Map 11 [3185L] : Soil associations -- Map 12 [3185M] : Illushi-Alegbette rice flood area -- Map 13 [3185N] : Uzo-Uwani farm settlement -- Map 14 [3185P] : Vegetation zones -- Map 15 [3185Q] : Forest reserves -- Fig. 7 [3185S] : Lower Niger, Lokoja to Aboh maximum & minimum range of water levels.