I. E., Umeonyiagu., Agboga. M. A., and Okeleke. J. N. 2019. “Soil Tests Analysis for Raft and Pile Foundations of a 5 Storey Building in Yenagoa, Bayelsa State, Nigeria”. American Scientific Research Journal for Engineering, Technology, and Sciences 52 (1):1-20. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4576.