Have you been vaccinated, and what protection is it against the small pox? : an essay / by William J. Collins.
- Collins, William J. (William Job), 1818-1884.
- Date:
- 1868
Licence: Public Domain Mark
Credit: Have you been vaccinated, and what protection is it against the small pox? : an essay / by William J. Collins. Source: Wellcome Collection.
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