Determination of Excessive Lifetime Cancer Risk for Workers Exposed to Natural Radioactive Materials  in Various Equipment in Oil and Gas Sector. Iraqi Journal of Science [Internet]. 2024 Sep. 10 [cited 2024 Nov. 24];65(8(SI):4820-7. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9550