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Beiträge zur Beurtheilung des Nutzens der Schutzpockenimpfung : nebst Mittheilungen über Massregeln zur Beschaffung untadeliger Thierlymphe / Bearbeitet im Kaiserlichen Gesundheitsamte. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.