WASET
    Collins C. Chiemeke,  Evaluation of Natural Drainage Flow Pattern, Necessary for Flood Control, Using Digitized Topographic Information: A Case Study of Bayelsa State Nigeria.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2014, vol. 91(7). 521 - 526
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9999310.