SHEIKH, S. A.; BAIG, J. A.; BAIG, M.; WAHEED, A. POLLUTION: A SILENT KILLER. KHYBER MEDICAL UNIVERSITY JOURNAL, [S. l.], v. 1, n. 1, 2009. Disponível em: https://www.kmuj.kmu.edu.pk/article/view/3978. Acesso em: 5 may. 2024.