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Ram, L.C. and Srivastava, N.k. and Tripathi, R.C. and Jha, S.K. and Sinha, Awadhesh Kumar and Singh, G. (2006) Management of mine spoil for crop productivity with lignite fly ash and biological amendments. Journal of Environmental Management , 79 (2). pp. 173-187. ISSN 0301-4797

Ram, L.C. and Tripathi, P.S.M. and Jha, S.K. and Sharma, K.P. and Singh, G. (1997) γ-irradiation of coal and lignite: effect on extractability. Fuel Processing Technology, 53 (1-2). pp. 1-14. ISSN 0378-3820