Balakrishnan, D. ., Umadevi , A. G., Abraham, J., Rajagopalan, M. and Jojo, J. (2012) “A Study on Activity Concentration of Natural Radionuclide of Building Materials in Kochi: Natural Radionuclide”, International Journal of Fundamental Physical Sciences, 2(3), pp. 41-43. doi: 10.14331/ijfps.2012.330034.