File:Pump Handle - John Snow .jpg - Wikipedia

John Snow

The Strange Case of the Broad Street Pump: John Snow and the Mystery of Cholera: Hempel, Sandra: 9780520250499: : Books

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The Fascinating Story Of The John Snow Pump In Soho - Living London History

John Snow - RationalWiki

The Lesson of John Snow and the Broad Street Pump, Journal of Ethics

John Snow - Wikipedia

No 127 hi-res stock photography and images - Page 7 - Alamy

Mapping disease: John Snow and Cholera — Royal College of Surgeons

Broad Street Cholera Pump – London, England - Atlas Obscura

Engora Data Blog

Broad Street Cholera Pump – London, England - Atlas Obscura