The geology of the Plateau tinfields : resurvey 1945-48 /
Mackay, R. A.(Robert Alexander)
Dixey, F.(Frank)
[Kaduna],
1949.
Colored spectacles in special pocket to accompany six anaglyphs.
In back pocket: Geological map at scale 1:125,000 -- Mineral distribution at scale 1:250,000.
Bibliography: p. 72-73.
Tin ores
Geology
Mines and mineral resources