Lehrbuch der Atmungsgymnastik : Anleitung zur Behandlung von Lungen-, Herz- und Unterleibsleiden / von Henry Hughes.
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Lehrbuch der Atmungsgymnastik : Anleitung zur Behandlung von Lungen-, Herz- und Unterleibsleiden / von Henry Hughes. Credit: 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.. Public Domain Mark