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1. Nigeria conflated historical administrative boundaries, 1948

1948. Map and Geospatial Information Center, Lewis Library, Princeton University. Shapefile representing historical boundaries of regions and provinces in Nigeria for 1948. GADM country-level administrative shapefiles were confla...

2. Nigeria extracted historical administrative boundaries, 1948

1948. Map and Geospatial Information Center, Lewis Library, Princeton University. Shapefile representing historical boundaries of regions and provinces in Nigeria for 1948. Boundaries were extracted from a scanned British Colonia...