Ogunlade, M. O., O. S. Ibiremo, C. I. Iloyanomon, L. A. Adebowale, N. Taiwo, and K. A. Oluyole. 2017. “Fertilizer Use and Kola Production in Southern Nigeria”. The International Journal of Science & Technoledge 5 (8). http://internationaljournalcorner.com/index.php/theijst/article/view/123621.