00520nam a2200157Ia 4500008004100000020001500041082001700056100001900073245007900092260006700171300000800238650004100246650003400287653002300321700001800344170901s1988    xx            000 0 und d  a9781310391  a632.96bY-1B  aYaninek, J. S. 0aBiological ControlbA Sustainable Solution to Crop Pest Problems in Africa  aNegeriabInternational Institute of Tropical Agriculturec1988  a210  aAgriculture and related technologies  aTechnology (Applied sciences)  aBiological control  aHerren, H. R.