Osamuyi Osasu, Ebuka Nwankwo and Paul Iyoha. “Suitability of Periwinkle Shell Mixed With Palm Kernel Shell Wastes As Replacement for Coarse Aggregate in Concrete Production”. Journal of Energy Technology and Environment 3, no. 3 (August 31, 2021). Accessed July 7, 2024. https://journals.nipes.org/index.php/jete/article/view/434.