berutu, prekdisampangate, Iswahyudi, and Dolly S. Siregar. “Mapping Thickness and Maturity Level Of Peat in The Simpang Wie Village, East-Langsa Sub-District, Langsa City”. Jurnal Online Pertanian Tropik 7, no. 2 (September 20, 2020): 174–184. Accessed August 4, 2025. https://idjpcr.usu.ac.id/jpt/article/view/3964.