Karim M, Abbas F, Mnawer E, Abass K. Measurement of radon gas concentration in fertilizer samples by using nuclear track detector (CR-39). JK-Physics [Internet]. 2011 Dec. 10 [cited 2024 May 18];3(2). Available from: https://journal.uokufa.edu.iq/index.php/jkp/article/view/7419