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The North-Western Medical and Surgical Journal logoLink to The North-Western Medical and Surgical Journal
. 1852 Oct;1(6):241–247.

Prolonged Exercise of the Vocal Organs, and of the Organs of Respiration, as a Means of Strengthening Them, and of Warding off Incipient Phthisis Pulmonalis

Stephen W Williams 1
PMCID: PMC9937145  PMID: 37319826

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