“Lichen Species as Bio-accumulator of some Halogens on Mount Cameroon Valcano, West Africa”, GJHSS, vol. 22, no. B4, pp. 19–35, Jan. 2023, Accessed: Jan. 17, 2026. [Online]. Available: https://socialscienceresearch.org/index.php/GJHSS/article/view/103574