update: 7-06-2012
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Articles from various sources | Artikelen uit diverse bronnen
Robert F. Gellerman, speech on "Das Amerikanische Orgel" at a historical meeting in Borna near Leipzig, German. 1999
The speech was pubhlished in Arbeitskreis Harmonium in der GdO, Oktober 1999, Heft 1, p. 12-18
Digital edition by Frans van der Grijn, 2012
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Dull Old Saws and Boring Drills by Charles E. Gould