Die Entwicklung der Bakterienfärbung : eine historisch-kritische Uebersicht / von P.G. Unna.

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Die Entwicklung der Bakterienfärbung : eine historisch-kritische Uebersicht / von P.G. Unna. Public Domain Mark. Source: Wellcome Collection.

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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.