Identification of Characteristics and Distribution of Subsurface Coal Using the 2D Geoelectric Method in Tanjung Palas Timur District, North Kalimantan. Fiziya [Internet]. 2022 Oct. 22 [cited 2026 Jan. 30];5(1):33-45. Available from: https://journal.uinjkt.ac.id/al-fiziya/article/view/23106