Geology of the Usongo area, Tanganyika territory (with map)
Grace, C. Stockley, G. M.
Article
1930
Journal of The East Africa and Uganda Natural History Society
185-192
Nature Kenya, East Africa Natural History Society
Nairobi The East Africa Natural History Society
In copyright. Digitized with the permission of the rights holder.
http://biodiversitylibrary.org/permissions
http://creativecommons.org/licenses/by-nc-sa/3.0/
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