Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Hygiene de la voix parlée ou chantée : suivie du forulaire pour le traitement des affections de la voix / par L. Mandl. 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.