Agarwal, D. ., S. S. . Chaudhary, S. . Sachdeva, S. K. . Misra, and P. . Agarwal. “Prevalence of Developmental Delay and Factors Affecting the Development Status Among Under 5 Children in an Urban Slum of Agra City”. National Journal of Community Medicine, vol. 9, no. 07, July 2018, pp. 474-9, https://njcmindia.com/index.php/file/article/view/748.