C. Vasquez, Franz Yanzy, Aileen Grace P. Fuentes, and Leomarich F. Casinillo. “Evaluating Eco-Friendly Soil Neutralizers: The Use of Pulverized Eggshells and Clam Shells in Enhancing Rice Field Soil Acidity”. EDUCATUM Journal of Science, Mathematics and Technology 11, no. 1 (March 26, 2024): 101–109. Accessed November 27, 2024. https://ejournal.upsi.edu.my/index.php/EJSMT/article/view/9088.