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2. Extraction of potassium from glauconitic sandstone;Mazumder;Int. J. Miner. Process,1993
3. Glauconite;McRae;Earth Sci. Rev.,1972
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5. National Seminar on Application in Chem. Engg. in the Utilization of Natural Resources, RRL, Bhubaneswar, 24–25th Feb.;Sharma,1993