Ali T. Mukhalif, Ali K. Al- Muttarri, Mahammed E. J. Al-Defiery, Ahmed A. Kahewish 2022. Measurement of natural radioactivity levels in the soils of some universities campus of babylon. Mesopotamia Environmental Journal (mesop. environ. j) ISSN: 2410-2598. 4, 2 (Feb. 2022), 8–22.