FAIZ, Y.; WAHEED, S.; SIDDIQUE, N. Air Quality Assessment of Faisalabad and Gujranwala Cities of Pakistan: Application of Pollution Indices. The Nucleus, [S. l.], v. 52, n. 2, p. 55–62, 2015. Disponível em: http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/650. Acesso em: 14 jun. 2024.