M. . Rana, S. Gajjar, R. . Sharma, A. . Sinha, B. . Chudasama, and P. . Kumar, “Evaluation Of National Immunization Day (NID) Activities Under Intensified Pulse Polio Immunization Program (IPPI) Feb 2012 in Central Gujarat, India”, Natl J Community Med, vol. 3, no. 04, pp. 720–724, Dec. 2012.