Essien, B.C., Idachaba, S.O. and Okai, E.E. 2019. Index of the phytoecological indicator species in the prevalent airborne pollen types in Akoko environment, Ondo State, Nigeria. GSC Biological and Pharmaceutical Sciences. 8, 3 (Sep. 2019), 023–041. DOI:https://doi.org/10.30574/gscbps.2019.8.3.0155.