Khan, Ghulam Jillani, Rashid Mehmood, Salah -ud- Din, and Ihtesham -ul- Haq. 2003. “EFFECT OF CHRONIC TOBACCO USE ON SALIVARY CONCENTRATIONS OF SODIUM AND POTASSIUM”. Journal of Ayub Medical College Abbottabad 15 (1). https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/3936.