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File:Martin D-18 Golden Era, Martin D-28 acoustic guitars, Museum of Making Music.jpg - Wikimedia Commons
Amazon.com: Martin Guitar Standard Series Acoustic Guitars, Hand-Built Martin Guitars with Authentic Wood D-18 : Musical Instruments
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Martin D-28 Museum Edition 1941 (2011)
Martin D18 vs D28: What's the Difference and Which to Buy? Guitar Space
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Maury's Blog - Maury's Music
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