Anwar, Muhammad Fathul, Agung Setyarini, and Yos Wahyu Harinta. 2025. “Utilization of Chicken Bone Waste into Calcium Fertilizer in SMK N 1 Mojosongo Boyolali ”. IJECS: Indonesian Journal of Empowerment and Community Services 6 (2):286-93. https://doi.org/10.32585/ijecs.v6i2.6841.