1. On possibility of using Glauconitic sandstone as a source of Raw Material for Potash Fertilizer;Soni;Ind. Mining and Engng. J.,1990
2. Availability of potash from non traditional sources;Choudhury;Technology,1973
3. High temperature interaction of Glauconite with calcium salts;Sharma;Fertilizer Technology,1979
4. Glauconite;Mc Rae;Earth Science Review,1972
5. Potash in the green sands of New Jersey;Mansfield;Bull. U.S. Geol. Survey,1922