GIA4813998 The ???ouble siren??by Hermann Ludwig Ferdinand von Helmholtz (1821-1894), a German physicist and physiologist, who studied extensively the mechanisms of hearing. by Unknown Artist, (19th century); Private Collection; (add.info.: The ???ouble siren??by Hermann Ludwig Ferdinand von Helmholtz (1821-1894), a German physicist and physiologist, who studied extensively the mechanisms of hearing.); by Giancarlo Costa; out of copyright.

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Creative#:

TOP27715194

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

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