@ARTICLE {HERREN: H.R. 1983b, title = {The Africa-wide programme for biolgical control of the cassava mealybug and green spider mites: the importance of thorough foreign exploration for beneficial insects and mites}, author = {Herren, H. R. and Lawson, T. L. }, journal = {Paper presented at the Third Brazilian Cassava Congress, 7-11 November 1983, Brasilian, Brazil}, year = {1983b}, pages = {7--11}, note = {RTB; Root and Tuber; Cassava}, }