Azli, Tarek, Faiza Zidouni, Mohammed Messaoudi, Abderezzak Hadri, and samir begaa. 2021. “Gamma Spectrometry for Natural Radioactive Nuclides in Spa Waters in Some Areas in North Algeria”. Algerian Journal of Engineering and Technology 5 (October), 43-48. http://jetjournal.org/index.php/ajet/article/view/136.