Ray, KGrover, S SRay, S NMohan, M MPaul, S1980-06-012009-06-011980-06-012009-06-011980-06-01Ray K, Grover SS, Ray SN, Mohan MM, Paul S. Sero-conversion following DPT immunization-comparison of two immunizing agents. Journal of Communicable Diseases. 1980 Jun; 12(2): 69-72http://imsear.searo.who.int/handle/123456789/112897engChild, PreschoolDiphtheria Antitoxin --analysisHemagglutination TestsHumansInfantTetanus Antitoxin --analysisVaccinationSero-conversion following DPT immunization-comparison of two immunizing agents.Comparative Study