ANALYSIS OF THE METEOROLOGY DROUGHT IN TOLIARA (MADAGASCAR), STANDARDIZED PRECIPITATION INDEX APPROACH AND THE WAVELET FREQUENCY METHOD - RANDRIANANTENAINA, Jean Eugène; RATIARISON, Adolphe Andriamanga; RAKOTOVAO, Niry; RATSIMAVO, Jacques Chrysologue (International Journal of Advance Research and Innovative Ideas In Education, 2020)