File:Britannica Oboe Hoffman Keys.jpg
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Britannica_Oboe_Hoffman_Keys.jpg (191 × 88 pixels, file size: 27 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:24, 22 May 2009 | 191 × 88 (27 KB) | Bob Burkhardt | {{Information |Description={{en|1=Musical notation showing the tones produced by the keys introduced in 1727 by Gerhard Hoffmann of Rastenberg.}} |Source=Encyclopædia Britannica, 11th ed., Vol. 19, p. 951 |Author=Kathleen Schlesinger |Date=1911 |Permissi |
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