Rahman, Abdul, et al. “Swallow Droppings for The Chemical Properties of Alluvial Soil As Growing Medium For Ebony (Diospyros Celebica)”. Jurnal Penelitian Pendidikan IPA, vol. 10, no. 8, Aug. 2024, pp. 5935-42, doi:10.29303/jppipa.v10i8.7856.