Phosphorus in siliceous manganese ores of Nishikhal, Orissa

od Acharya, B. C., Acharya, B. C.
Wydane 1994

Geology, geochemistry and genesis of the freshwater, Precambrian manganese deposit of the iron ore group from Noamundi basin, Eastern India

od Dasgupta, H. C., Dasgupta, H. C.
Wydane 1999