[1]
Zetra, Y. et al. 2018. The Oxygenated Biomarker as an Indicator of Origin and Maturity of Miocene Brown Coal, Sangatta Coal Mines, East Kalimantan. Indonesian Journal on Geoscience. 5, 2 (May 2018), 107–116. DOI:https://doi.org/10.17014/ijog.5.2.107-116.