Mohammed Sahib Salman, Harith AbdulJabbar Ayoob, and Raed Sami Tuama Aljuboori. “NASAL ENDOSCOPIC FINDINGS IN CHRONIC NASAL OBSTRUCTION”. World Bulletin of Public Health, vol. 8, Mar. 2022, pp. 103-9, https://scholarexpress.net/index.php/wbph/article/view/664.