Mustafa, M. M., A. El behiry, and Y. M. El Mossad. “Al-Qassim Industrial Area and Its Role in Changing the Diseases Patterns Among Workers over the past Five Years (2011-2015)”. International Journal Of Community Medicine And Public Health, vol. 3, no. 12, Dec. 2016, pp. 3465-73, doi:10.18203/2394-6040.ijcmph20164276.