WASET
    Ravi Shah and  V. L. Manekar and  R. A. Christian and  N. J. Mistry,  Estimation of Reconnaissance Drought Index (RDI) for Bhavnagar District, Gujarat, India.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2013, vol. 79(7). 507 - 510
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/16568.