NAINGGOLAN, Tiara Bunga; HASAIRIN, Ashar. Correlation of Traffic Densityon Nitrogen Dioxide Levels and Thallus Chlorophyll Content in Lichen Thallus on Angsana Trees (Pterocarpus indicus) in Medan Industrial Area2. Biospecies, [S. l.], v. 18, n. 2, p. 60–70, 2025. DOI: 10.22437/biospecies.v18i2.46548. Disponível em: https://www.online-journal.unja.ac.id/biospecies/article/view/46548. Acesso em: 22 apr. 2026.