“USE OF GROUND NUT SHELL ASH AND COAL ASH TO MODIFY THE PROPERTIES OF SOIL”. International Journal of Advance Engineering and Research Development (IJAERD) 4, no. 5 (May 25, 2017): 1012–1017. Accessed September 8, 2025. https://ijaerd.org/index.php/IJAERD/article/view/4897.