Chudasama, Rajesh K2008-08-202009-05-292008-08-202009-05-292008-08-20Chudasama RK. Comparative evaluation of intensive pulse polio immunization in district Valsad in the year 2007 and 2008. Indian Journal of Medical Sciences. 2008 Aug; 62(8): 339-41http://imsear.searo.who.int/handle/123456789/69448engComparative evaluation of intensive pulse polio immunization in district Valsad in the year 2007 and 2008.Letter