“Variation of Bio-Activators (EM-4 and Leri Water) in Processing Household Organic Waste into Organic Compost Ready to Use in Gebang Putih Surabaya”. Nusantara Science and Technology Proceedings (November 22, 2022): 58–62. Accessed April 24, 2025. https://nstproceeding.com/index.php/nuscientech/article/view/759.