Sinha, N K1978-04-012009-06-011978-04-012009-06-011978-04-01Sinha NK. Efforts of Indian railways in eradication of smallpox. Indian Journal of Public Health. 1978 Apr-Jun; 22(2): 210-2http://imsear.searo.who.int/handle/123456789/109791engHumansIndiaInfant, NewbornRailroadsSmallpox --prevention & controlTravelVaccinationEfforts of Indian railways in eradication of smallpox.Journal Article