00319nam a2200109Ia 450000500170000000800410001705000240005810000180008224500610010026000260016165000220018720251229124553.0251229s9999    xx            000 0 und d  aAFR SB 52 .A358K37   aKassam, A. H. 0aCrops of the West African Semi Arid tropicscA. H Kassam  aIndiab ICRISATc1976  aCrops-West Africa