1. Abbady A., El-Arabi A.M., Abbady A.G.E., Taha, S., 2008. Gamma ray measurements of natural radioactivity in cultivated and reclaimed soil, Upper Egypt. In: Proceedings of the International Conference on Radioecology and Environmental Radioactivity. Norway, 15–20.
2. Drinking Water Specifications in India;AERB,2004
3. External gamma radiation levels and natural radioactivity in soil around a phosphate fertilizer plant at Mumbai;Ajmal;J. Radioanal. Nucl. Chem.,2014
4. Bastos R.O., Apploni C.R., 2009. Radioactivity of rocks from the geological formations belonging to the Tibagi river hydrographic basin. In: Proceedings of the International Nuclear Atlantic Conference – INAC 2009. Rio de Janeiro, RJ, Brazil.
5. Assessment of natural radioactivity and function of minerals in soils of Yelagiri hills, Tamilnadu, India by Gamma Ray spectroscopic and Fourier Transform Infrared (FTIR) techniques with statistical approach;Chandresekaran;Spectrochim. Acta Part A: Mol. Biomol. Spectrosc.,2015