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tuba - Wiktionary
The Structure of the Tuba:The Tuba Can Have Various Styles - Musical Instrument Guide - Yamaha Corporation
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Tuba - Wikipedia
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Tuba - Wikipedia
The Structure of the Tuba:The Tuba Can Have Various Styles - Musical Instrument Guide - Yamaha Corporation
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Tuba Buying Guide - How to Choose a Tuba
What are the Different Kinds of Tubas? - Yamaha Music
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