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The Science News-Letter
Vol. 44, No. 9 (Aug. 28, 1943), pp. 139-140
Published by: Society for Science & the Public
Stable URL: http://www.jstor.org/stable/3920440
Page Count: 2
You can always find the topics here!Topics: Smallpox, School age children, Diphtheria, Vaccination, Age groups, Immunization, Typhoid
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