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2. Bat-pollination of the silk-cotton tree, Ceiba pentandra (L.) Gaertn. (sensu lato), in Ghana;Baker;Journal of the West African Science Association,1959
3. A technique for the study of insect-borne pollen;Beattie;Pan-Pacific Entomologist,1971
4. The ingestion of syrup by the honey bee;Betts;Bee World,1930
5. Rodent pollination in Protea nana;Biccard;South African Journal of Botany,2009