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Columbite deposits of the lower Puruni River, British Guiana/

by Whyte, F.
Series: British Guiana. Geological Survey Department. Mineral resources pamphlet; . no. 2. Published by : Geological Survey Department, (Georgetown : ) Physical details: 3p., 1 folded map. Subject(s): Niobium ores -- Guyana -- Puruni River. Year: 1953
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