Dangma W, Sukrat C, Treerat S, Damrongwattana jittima. STUDY OF LEARNING CENTER EXTRACTION OF COLD PRESSED COCONUT OIL, LAN SAKA DISTRICT NAKHON SI THAMMARAT PROVINCE. JISSD [internet]. 2024 May 5 [cited 2025 Jun. 16];2(1):42-51. available from: https://so18.tci-thaijo.org/index.php/J_ISSD/article/view/129