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Allen Organ ADC & MDS Tone Card, Diapason 8' | eBay
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John Bennett Diapason Movement Old English Organ Music Book IV (Hauptwerk Azzio) - YouTube
First United Methodist Church — Harrisburg AGO
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Encyclopedia of Organ Stops
Testing the 32' Diapason on the Largest Pipe Organ in the World! - YouTube
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4/34 Robert Morton Organ - Ohio Theatre - Columbus, OH - Solo Chamber - 16' Diaphonic Diapason and 16' Tuba Mirabilis Photos
