Waheed Ullah, Sara Jamil Khan. “Assessment Level of Knowledge about Supplementary Polio Immunization in Mothers Presenting to Pediatric Population”. Pakistan Journal of Medical & Health Sciences 16, no. 08 (October 2, 2022): 540. Accessed August 17, 2024. https://pjmhsonline.com/index.php/pjmhs/article/view/2495.