File:Norwegian military signal drum 1700 Great Nordic War Rustkammeret Army and Resistance Museum Trondheim Norway 2019-03-20 9485.jpg - Wikimedia Commons
Tromme - Wikiwand
Tromme – Wikipedia
File:Percusion Galicia.jpg - Wikimedia Commons
File:Norwegian military signal drum 1808 Napoleonic Wars Battle of Trangen against Sweden Drum etc Rustkammeret Army and Resistance Museum Trondheim Norway 2019-03-20 9552.jpg - Wikimedia Commons
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Stortromme - Wikipedia, den frie encyklopædi
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