Essential points of difference between the larynx of the negro and that of the white man / by George Duncan Gibb.

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Essential points of difference between the larynx of the negro and that of the white man / by George Duncan Gibb. Public Domain Mark. Source: Wellcome Collection.

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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.