In copyright
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Credit
A survey of industrial health-hazards and occupational diseases in Ohio / by E. R. Hayhurst, A. M., M. D., director, Division of Occupational Diseases, State Board of Health. In copyright. 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.