Determination the concentrations of radon gas and exhalation rate in some phosphate fertilizer using CR-39 track detector. Iraqi Journal of Physics, [S. l.], v. 15, n. 32, p. 136–144, 2019. DOI: 10.30723/ijp.v15i32.164. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/164.. Acesso em: 27 apr. 2024.