» Tracts on inoculation: written and published at St. Petersburg in the year 1768, by command of Her Imperial Majesty ... with additional observations on epidemic small-pox, on the nature of that disease, and on the different success of the various modes of inoculation
Tracts on inoculation: written and published at St. Petersburg in the year 1768, by command of Her Imperial Majesty ... with additional observations on epidemic small-pox, on the nature of that disease, and on the different success of the various modes of inoculation
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