WASET
    B. L. Gadiga,  Analyzing the Changing Pattern of Nigerian Vegetation Zones and Its Ecological and  Socio-Economic Implications Using Spot-Vegetation Sensor.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2018, vol. 142(10). 648 - 656
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10009712.