“Utilization of Shell Waste As Organic Fertilizer in Gending, Probolinggo Regency”. Khidmatuna: Journal of Research and Community Service 2, no. 2 (January 7, 2024): 19–24. Accessed February 2, 2026. https://jurnal.institutsunandoe.ac.id/index.php/khidmatuna/article/view/403.