@MANUAL {BERNER:1997a, title = {Striga research methods: a manual}, author = {IITA, }, editor = {Berner, D. K. and Winslow, M. D. and Awad, A. E. and Cardwell, K. and Mohan-Raj, D. R. and Kim, S. K. }, year = {1997}, month = {June}, edition = {2nd}, note = {General; Learning Material; 81p.}, }