Fitri, R.A. and Wirakusuma, A. and Fahrina, A. and Roil Bilad, M. and Arahman, N. (2019) Adsorption performance of low-cost Java plum leaves and guava fruits as natural adsorbents for removal of free fatty acids from coconut oil. International Journal of Engineering, Transactions A: Basics, 32 (10). pp. 1372-1378. ISSN 17281431