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- 描述:
- Photograph of William H. Welch. Note on verso: “‘Our Popsy’ 1906 Prof. of Pathology and Bacteriology.”
- 创建日期:
- 1906
- 描述:
- Photograph of Robert Koch, who demonstrated the bacterial causes of many specific diseases. Koch received the Nobel Prize in 1905.
- 创建日期:
- undated