K. M. Al- Ramahi, F. “SPATIAL ANALYSIS OF RADON GAS CONCENTRATION DISTRBUTED AT BAGHDAD CITY USING REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEM TECHNIQUESD”. IRAQI JOURNAL OF AGRICULTURAL SCIENCES 51, no. Special (January 24, 2020). Accessed April 21, 2021. https://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/879.