Lead Levels in the Urine of Active Smokers and Passive Smokers in the Surroundings of Wadung Asri Sidoarjo. International Journal of Advanced Health Science and Technology [Internet]. 2023 Aug. 30 [cited 2025 Oct. 26];3(4):266-73. Available from: https://ijahst.org/index.php/ijahst/article/view/286