K. A. Kabir, S. M. A. Islam and M. M. Rahman, “Distribution of Radionuclides in Surface Soil and Bottom Sedi- ment in the District of Jessore, Bangladesh and Evaluation of Radiation Hazard,” Journal of Bangladesh Aca- demy of Science, Vol. 33, No. 1, 2009, pp. 117-130.
 D. Jasaitis, M. Peciuliene and A. Girgzdys, “Evaluation of Radionuclide Concentration in the Bottom Ground of Water Reservoir and Waterside Soil,” Journal of Environ- mental Engineering and Landscape Management, Vol. 12, No. 3, 2004, pp. 85-90.
 M. R. Abdi, H. Faghihian, M. Kamali, M. Mostajaboddavati and A. Hasanzadeh “Distribution of Natural Radionuclides on Coasts of Bushehr, Persian Gulf, Iran,” Iranian Journal of Science & Technology, Vol. 30, No. A3, 2006, pp. 259-269.
 G. Trabidou, H. Florou, A. Angelopoulos and Sakelliou, “Environmental Study of the Radioactivity of the Spas in the Island of Ikaria,” Radiation Protection Dosimetry, Vol. 63, No. 1, 1996, pp. 63-67.
 N. M. Ibrahiem, A. H. Abdel Ghani, S. M. Ahawky, E. M. Ashraf and M. A. Faouk, “Measurement of Radioactivity Levels in Soils in the Nile Delta and Middle Egypt,” Health Physics, Vol. 64, No. 6, 1993, pp. 620-627. doi:10.1097/00004032-199306000-00007
 M. A. Muhammad, I. F. Idris, P. M. Simon and S. A. Arabi, “Distribution of Gamma-Emitting Radionuclides in Soil around the Center for Energy Research and Training (CERT) Ahmadu Bello University, Zaria, Zaria-Nigeria,” Journal of American Science, Vol. 6, No. 12, 2010, pp. 995-1001.
 M. I. Chowdhury, M. N. Alam and S. K. S. Hazari, “Dis- tribution of Radionuclides in the River Sediment and Costal Soil of Chittagong, Bangladesh and Evaluation of the Radiation Hazard,” Applied Radiation and Isotope, Vol. 51, 1999, pp. 747-755. doi:10.1016/S0969-8043(99)00098-6
 S. Ali, M. Tufail, K. Jamie, A. Ahmed and H. A. Khan, “Gamma-Ray Activity and Dose Rate of Brick Samples from Some Area of North West Frontier Province (NWFP), Pakistan,” Science of total Environment, Vol. 187, 1996, pp. 247-252. doi:10.1016/0048-9697(96)05109-1