Sinaga, Nadia Rouli, and Ashar Hasairin. “Korelasi Kepadatan Lalu Lintas Dengan Kadar Timbal (Pb) Dan Klorofil Talus Liken Di Patumbak, Deli Serdang”. Biocaster : Jurnal Kajian Biologi 6, no. 4 (October 27, 2026): 2138–2147. Accessed October 31, 2026. https://e-journal.lp3kamandanu.com/index.php/biocaster/article/view/1651.