Berg, H. v. d. (1993). Natural control of Helicoverpa armigera in smallholder crops in East Africa. [publisher not identified].
Chicago Style (17th ed.) CitationBerg, Henk van den. Natural Control of Helicoverpa Armigera in Smallholder Crops in East Africa. [Wageningen]: [publisher not identified], 1993.
MLA (9th ed.) CitationBerg, Henk van den. Natural Control of Helicoverpa Armigera in Smallholder Crops in East Africa. [publisher not identified], 1993.
Warning: These citations may not always be 100% accurate.