Juliana Siregar, Mia, and . . “Characteristic of Husk Charcoal, Bokashi Compost, and Wood Charcoal As Biofilter Filler on Application of Ammonia 5 Percent”. International Journal of Engineering & Technology 7, no. 4.40 (December 16, 2018): 53–56. Accessed April 28, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/24074.