Bayrak, G., KeleÅŸ, E. and Atik, D. (2018) “Estimation of Radioactivity Caused by Chemical Fertilizers on Trakya Sub-Region Soils and Its Potential Risk on Ecosystem”, European Journal of Sustainable Development, 7(3), p. 413. doi: 10.14207/ejsd.2018.v7n3p413.