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Die Bedeutung des Herzschlages für die Athmung : eine neue Theorie der Respiration dargestellt für Physiologen und Ärzte. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.