Piyang, Tuanjai, and Rarin Khuawaraphan. 2019. “By-Product Synergy from Nipa Palm Frond Processing Waste Ban Laem Community, Trang Province”. Area Based Development Research Journal 11 (6), 503-17. https://so01.tci-thaijo.org/index.php/abcjournal/article/view/214084.