Nasution, Nanda Eska Anugrah, and Chairany Rizka Rizka. 2022. “Production of Liquid Compost With EM4 Bio Activator Volume Variation from Vegetable and Fruit Waste”. META: Journal of Science and Technological Education 1 (1):87-99. https://meta.amiin.or.id/index.php/meta/article/view/7.