00582cam a22002177a 4500003000500000005001700005008004100022010000900063011000900072035000900081040000900090082001600099100002400115245005800139260004000197300002300237490002800260650003300288650001500321830002800336CHAP20220329133155.0971013s1991 r 00010 d a2982 a3954 a3155 cCHAP a632.12bS5200aSivakumar, M. V. K. 0aDrought spells and drought frequencies in west Africa aPatancheru, India :bICRISAT,c1991 a181 p.b; gráfs. 0aResearch bulletinv; 1314aAgriculturaxAfricazAfrica.14aSequías.0 aResearch bulletinv; 13