Fitrianah, Listin, and Agus Rachmad Purnama. “Sebaran Timbal Pada Tanah Di Areal Persawahan Kabupaten Sidoarjo”. Journal of Research and Technology 5, no. 2 (December 30, 2019): 106–116. Accessed March 5, 2025. https://journal.unusida.ac.id/index.php/jrt/article/view/307.