Lecture on scientific voice production and breathing exercises : their relation to health / delivered by Cortlandt MacMahon.
- MacMahon, Cortlandt.
- Date:
- 1910
Licence: In copyright
Credit: Lecture on scientific voice production and breathing exercises : their relation to health / delivered by Cortlandt MacMahon. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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