Geological Survey of India. (1994). General information on manganese ores in India. Geological Survey of India.
Chicago-referens (17:e uppl.)Geological Survey of India. General Information on Manganese Ores in India. [Calcutta]: Geological Survey of India, 1994.
MLA-referens (8:e uppl.)Geological Survey of India. General Information on Manganese Ores in India. Geological Survey of India, 1994.
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