Njokuocha, RC, and EE Osayi. “Airborne Pollen and Spore Survey in Relation to Allergy and Plant Pathogens in Nsukka, Nigeria”. Bio-Research 3, no. 1 (April 10, 2006): 77–84. Accessed August 12, 2026. https://www.ajol.info/index.php/br/article/view/28575.