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Credit
Hygiène des professions et des industries, précédée d'une étude générale des moyens de prévenir et de combattre les effets nuisibles de tout travail professionnel / par Alexandre Layet. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.