Putro, Gunawan Madyono, and Prijoto Prijoto. “Study of Investment in the Organic Fertilizer Industry to Improve Community Economists”. RSF Conference Series: Engineering and Technology 1, no. 1 (November 15, 2022): 652–660. Accessed August 31, 2024. https://proceeding.researchsynergypress.com/index.php/cset/article/view/441.