2004-10-30/2019-09-27 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). — Son of Charles Hendrickson, brother of Andreas Hendrickson; with Hendrickson firm of St. Peter, Minnesota, 1980s. Source: John Panning.
2015-09-21/2019-09-27 - From Organ Database Builders editor Stephen Hall, September 27, 2019. — Head of installations, tuning and service by 2014. Source: Jessica Bies, "PORTRAITS: Sons of St. Peter pipe organ maker continue Hendrickson legacy", St. Peter Herald, March 27, 2014.
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