ZAKIR, S. N.; ALI, L.; KHATTAK, S. A. Variation in major element oxide with time in the soils of Peshawar Basin: their comparison with the normal agricultural soil . Journal of Himalayan Earth Sciences, [S. l.], v. 46, n. 2, p. 35-48, 2013. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1669. Acesso em: 6 jan. 2025.