Ardiyanti, A.D. , Adhitama, L. and Wahyutiyani, R. 2020. Efficient Compost Fertilizer with Addition of Fatty Acid Results of Used Cooking Oil Saponification Reaction. Proceeding International Conference on Science and Engineering. 3, (Apr. 2020), 125–128. DOI:https://doi.org/10.14421/icse.v3.483.