Boonkwang, N., and T. Boonphakdee. “Sources and Distribution of Organic Matter in Coastal Area of Muang Chonburi District, Eastern Thailand: Using Carbon and Nitrogen Stable Isotopes: 10.32526/Ennrj/20/202100219”. Environment and Natural Resources Journal, vol. 20, no. 4, May 2022, pp. 348-5, https://ph02.tci-thaijo.org/index.php/ennrj/article/view/246678.