Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 Adhi Putra, I Made. " PRODUCTION OF BIODIESEL FROM WASTE COOKING OIL BY TRANSESTERIFICATION REACTION USING CaO/NATURAL ZEOLITE CATALYSTS" CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) [Online], Volume 5 Number 2 (22 December 2017)