Stumpf Papers: [Stumpf, Carl], [Untitled folder]. [Envelope] 5. Diagramme zu den Resonanzversuchen (Vokale))
includes a letter from Felix Stumpf
From the series
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Ethnologisches Museum der Staatlichen Museen zu Berlin - Preußischer Kulturbesitz, Berliner Phonogramm-Archiv
In public domain
The Virtual Laboratory / MPIWG
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