Kulsawat, Wutthikrai, Phatchada Nochit, and Jaruwit Khunsamut. “epth rofiles of oil arbon sotopes s nfluenced by rop esidues”. Science & Technology Asia 26, no. 2 (June 25, 2021): 79-86. ccessed December 2, 2021. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/238136.