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Dinil Sony C, P Jayakumar and S P Rajagopalan(2003) Estimation of a safe level of mining of river sand- A Case Study in Eramala Gramma Panchayath,,Proc. 13th Swadeshi Science Congress, 6-8, November, 2003, pp:157-161.

Basak. P, Narasimha Prasad, N.B, Nazimuddin, M. and Roy, A.K, 1986, “ Regional Groundwater Resources Development in the Chaliyar River Basin through Remote Sensing”, International Seminar on Photogrammetry and Remote Sensing for the Developing Countries, New Delhi, Vol .I.