Nigeria 1:50,000.
Nigeria.Federal Surveys.
Northern Nigerian Survey.
Kaduna State Surveys.
Lagos : Nigeria Federal Surveys,
1958-
Relief shown by contours and spot heights.
In margin: Reliabilty diagram -- Boundary diagram -- Boundary notes -- Sheet history -- Index to adjoining sheets.
Various editions.
Most of the maps are published by Federal Surveys, Nigeria; some maps published by Survey Department, Kaduna or Northern Nigerian Surveys.
Terrain, vegetation, and cultural features shown by symbols.
Interfiled with: Directorate of Overseas Surveys maps.
Graphic index in central file.