EGOR, Atan Obeten; USHIE, Joseph A.; ABONG, Augustine Agwul. Geological Determinants of Indoor Radon-222 Levels in Residential Buildings: A Case Study of Cross River State, Southeastern Nigeria. Nigerian Journal of Physics, [S. l.], v. 35, n. 3, p. 274–283, 2026. DOI: 10.62292/njp.v35i3.2026.597. Disponível em: https://njp.nipngr.org/index.php/njp/article/view/597. Acesso em: 6 jul. 2026.