C. P. B. . Elcano, J. A. M. T. . Escoto, P. L. A. . Manansala, J. D. B. . Tulalian, and J. L. . Valdellon, “An Investigatory Project on Powdered Eggshell as an Additive for Toothpaste: Vol.3, No.1D”, AASgBCPJMRA, vol. 3, no. 1D, Apr. 2024.