Uddin, M.; Hossain, A.; Haque, M. M. .; Barua, S. Assessment of the Activity Concentrations of the Naturally Occurring Radionuclides from the Samples Collected from the Different (CUFL & JFL) Urea Fertilizer Company Limited: Geophysics. Int. J. Fundam. Phys. Sci 2017, 7, 25-29.