“Sintesis dan Karakterisasi Pupuk Lepas lambat Fe-Zn dari Limbah Besi, Limbah Seng, dan Cangkang Telur Ayam” (2024) Jurnal Serambi Engineering, 9(3), pp. 9841–9847. Available at: https://jse.serambimekkah.id/index.php/jse/article/view/321 (Accessed: 29 October 2025).