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Credit
Traité d'hygieǹe industrielle à l'usage des médecins et des membres des conseils d'hygieǹe / par León Poincare. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.