O. Ajala, M., K. J. Akinyede, G. O. Adunoye, and I. J. Akintola. “A Study on the Effects of Groundnut Shell Ash on Strength Characteristics of Soil”. International Journal of Advanced Geosciences 8, no. 1 (June 14, 2020): 41–46. Accessed May 3, 2024. https://www.sciencepubco.com/index.php/IJAG/article/view/30645.