KHAN, K.; ORFI, S. D.; KHAN, H. M. . Distribution of primordial radionuclides in phosphate fertilizers and rock deposits of Pakistan. Journal of Himalayan Earth Sciences, [S. l.], v. 37, n. 1, p. 59-64, 2004. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1574. Acesso em: 29 dec. 2024.