TY - BOOK AU - M V K SIVAKUMAR TI - DROUGHT SPELLS AND DROUGHT FREQUENCIES IN WEST AFRICA SN - 9290661828 U1 - P338.140966SI92 PY - 1991/// CY - PATANCHERU PB - INTERNATIONAL CROPS RESEARCH INSTITUTE FOR THE SEMI ARID TROPICS KW - DROUGHT SPELLS AND DROUGHT FREQUENCIES IN WEST AFRICA N1 - GIFT ER -