20210207002100.0 http://journal.uir.ac.id/index.php/JGEET 2541-5794 Journal of geoscience, engineering, environment and technology (Pekanbaru. Online) Indonesia 2541-5794 Journal of geoscience, engineering, environment and technology. 2541-5794 2503-216X Journal of geoscience, engineering, environment and technology. 2541-5794 Journal of geoscience, engineering, environment and technology (Pekanbaru. Online)