Azubuike, Nkiruka C., and Obioma C. Ejiogu. “Nasal Secretion Cytology of Children Attending a Primary School in Enugu Metropolis – A Preliminary Evaluation Using the Blow-Out Technique”. European Journal of Medical and Health Sciences 3, no. 4 (July 5, 2021): 13–18. Accessed September 25, 2021. https://ejmed.org/index.php/ejmed/article/view/930.