Inuwa, I. I., Wanyona Githae, and Diang’a Stephen. “Application of Project Planning Techniques in Construction Procurement: The Case of Nigerian Indigenous Contractors”. International Journal of Economic Development Research and Investment (IJEDRI) 5, no. 1 (April 1, 2014): 31–47. Accessed September 19, 2024. http://icidr.org.ng/index.php/Ijedri/article/view/865.