Rahaf Safadi, Riham Al-Safadi , Reef Al-Safadi , Zahra Al-Saigh , Maram Al-Otaibi , Hassan Al-Farraj , Fatimah Al-Otaibi , Amal Al-Abdulwahab, Yasmeen Al-Bagshi. 2018. “Relationship of Drinking Water to Dental Calculus in Saudi Arabia: Riyadh in Comparison to Eastern Province”. International Journal of Emerging Trends in Science and Technology 5 (06), 6637-45. http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1266.