TY  - BOOK
AU  - Sivakumar, M. V. K.
TI  - Drought spells and drought frequencies in west Africa
T2  - Research bulletin
U1  - 632.12 
PY  - 1991///
CY  - Patancheru, India
PB  - ICRISAT
KW  - Agricultura
KW  - Africa
KW  - Sequías
ER  -