POHAN, Muslimah; HASAIRIN, Ashar. Correlation of Traffic Density with Sulfur Dioxide (SO₂) Levels and Thallus Chlorophyll of Lichens as Bioindicators on Angsana Trees (Pterocarpus indicus Willd.) in the Medan Industrial Area II. Biospecies, [S. l.], v. 18, n. 2, p. 49–59, 2025. DOI: 10.22437/biospecies.v18i2.46547. Disponível em: https://www.online-journal.unja.ac.id/biospecies/article/view/46547. Acesso em: 22 apr. 2026.