Modification of CaO Catalyst From Chicken Eggshell With Wet Impregnation Method for Two-Stage Process of Biodiesel from Tamanu Oil. jse [Internet]. 2025 Jul. 11 [cited 2026 Jun. 26];10(3). Available from: https://jse.serambimekkah.id/index.php/jse/article/view/1069