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Robert Koch – Biographical - NobelPrize.org
Robert Koch – Facts - NobelPrize.org
Robert Koch - Wikipedia
The Nobel Prize in Physiology or Medicine 1905 - NobelPrize.org
Robert Koch | German Bacteriologist & Nobel Laureate
Robert Koch’s Nobel Prize for Medicine - History Today
Robert Koch - Biography
Robert Koch - Robert Koch: One of the founders of microbiology …
Robert Koch | The founder of modern bacteriology - New Scientist
Robert Koch - Humboldt-Universität zu Berlin