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- [2] Food for insect pollinators on farmland: insect visits to flowers of annual seed mixtures Journal of Insect Conservation, 2002, 6 : 13 - 23
- [4] EFFECTS OF INSECT POLLINATORS ON FRUIT-SET OF COCOA FLOWERS 10TH INTERNATIONAL COCOA RESEARCH CONFERENCE: THEME : RATIONALIZATION OF COCOA CULTURE AND THE DEVELOPMENT OF MORE EFFICIENT CROPPING SYSTEMS, 1988, : 303 - 306