“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 3, no. 4 (August 30, 2023): 266–273. Accessed August 17, 2025. https://ijahst.org/index.php/ijahst/article/view/286.