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Credit
Ueber bakteriologische Forschung : Vortrag in der 1. allgemeinen Sitzung des X. internationalen medicinischen Congresses am 4. August 1890 / von R. Koch. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.