PILLAY, K VPILLAI, S S1953-01-012009-05-271953-01-012009-05-271953-01-01PILLAY KV, PILLAI SS. Studies in the purification of anti-smallpox vaccine. Indian Journal of Medical Research. 1953 Jan; 41(1): 1-16http://imsear.searo.who.int/handle/123456789/22973engSmallpoxVaccinationVaccinesJournal Article