Darman, Herman, and Yahdi Zaim. “Sedimentology of Coal Conglomerate Deposits Within Channel Facies in Samarinda Region, East Kalimantan, Indonesia”. Berita Sedimentologi, vol. 5, no. 1, Aug. 2021, pp. 3-5, doi:10.51835/bsed.1997.5.1.300.