Fadillah, Sakinah. “Relation of Lead (pb) Levels With Ion Calcium (ca2+) Levels of Alley Gas Station’s Operators”. Jurnal Ilmiah Kesehatan Sandi Husada 11, no. 1 (June 1, 2022): 307-311. Accessed May 21, 2024. https://akper-sandikarsa.e-journal.id/JIKSH/article/view/1150.