Argakoesoemah, RM Iman, and Didit Ariady Firmansyah. “Half-Day Visit to Solok-Sawahlunto Area, Ombilin Basin: A Short Observation on Non-Marine Depositional Sequences”. Berita Sedimentologi 20, no. 1 (August 7, 2021): 12–17. Accessed October 30, 2026. https://journal.iagi.or.id/index.php/FOSI/article/view/216.