Kumar, Arvind, Kuryan George, and Anuradha Bose. 2018. “Immunization Coverage Among Children Aged 12-23 Months in Surajgarha Block, Lakhisarai District, Bihar: A Cluster Sampling Survey”. National Journal of Community Medicine 9 (04):307-11. https://www.njcmindia.com/index.php/file/article/view/710.