Handayani, Tri. 2021. “Report on the Geological Field Trip to Mahakam Delta and Balikpapan Bay (August 31st to September 4th, 2018), Organized by FOSI-IAS-SEPM As Part of Regional Seminar: Past & Present Sedimentation in Tropical Region”. Berita Sedimentologi 42 (1):43-47. https://doi.org/10.51835/bsed.2019.42.1.76.