Boonpeng, Chaiwat, Duangkamon Sangiamdee, Sutatip Noikrad, Santi Watthana, and Kansri Boonpragob. 2020. “Metal Accumulation in Lichens As a Tool for Assessing Atmospheric Contamination in a Natural Park: DOI: 10.32526/Ennrj.18.2.2020.16”. Environment and Natural Resources Journal 18 (2). Nakhon Pathom, Thailand:166-76. https://ph02.tci-thaijo.org/index.php/ennrj/article/view/236303.