Yuliana Y, Rini ES, Sirojuzilam, Situmorang SH. Sustainable Ecology: Problems and the Perspective of Ecosystems in Tangkahan. ijjm [Internet]. 2023Oct.20 [cited 2024Aug.22];4(4):445-57. Available from: https://ilomata.org/index.php/ijjm/article/view/781