Jha, N, and SR Niraula. “Vaccinating Children Against Diphtheria, Pertussis, Tetanus and Poliomyelitis in Nepal”. Health Renaissance 9, no. 2 (July 4, 2011): 112–115. Accessed May 15, 2024. https://www.nepjol.info/index.php/HREN/article/view/4984.