The rate of radioactive exposure in the air for the center of Tikrit district and Al-Alam district, Salah al-Din governorate. Journal of the College of Basic Education, [S. l.], v. 21, n. 89, p. 217–224, 2022. DOI: 10.35950/cbej.v21i89.6581. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/6581.. Acesso em: 8 jul. 2024.