CHAD-UMOREN, Yehuwdah E.; BRIGGS-KAMARA, Margaret A. Environmental ionizing radiation distribution in Rivers state, Nigeria. Journal of Environmental Engineering and Landscape Management, [S. l.], v. 18, n. 2, p. 154–161, 2010. DOI: 10.3846/jeelm.2010.18. Disponível em: https://journals.vilniustech.lt/index.php/JEELM/article/view/6081. Acesso em: 9 may. 2025.