Mr. Gajanan H. Chavhan, Mangesh S. Deshpande, Rajesh M. Jalnekar. A comprehensive Investigation of Drought and Standard Precipitation Index (SPI). MSEA [Internet]. 2023Jan.23 [cited 2024May5];71(4):10058-6. Available from: https://www.philstat.org/index.php/MSEA/article/view/1821