Tariq, Muhammad, Riffat Sultana, and Amin Haq. “ERYTHROCYTES INDICES IN MALE SMOKERS AND HEROIN ADDICTS”. Pakistan Journal of Physiology 9, no. 2 (December 31, 2013): 32-34. Accessed April 3, 2020. http://pjp.pps.org.pk/index.php/PJP/article/view/387.