2004-10-30/2019-04-29 - From the OHS PC Database, derived from A Guide to North America Organ Builders, rev. ed. by David H. Fox (Organ Historical Society, 1997). William Czelusniak was born in 1952 in Holyoke, Massachusetts; he attended the University of Massachusetts at Amherst, Massachusetts, 1970. He worked with local builders including Allen E. Hastings of Athol, Massachusetts, and John Wessel of Brattleboro, Vermont, 1966-1976; He was partner with Francis E. Dugal in Czelusniak et Dugal of Northampton, Massachusetts, 1970; active in 1989. Sources: William Czelusniak.
2018-05-07/2019-04-29 - From the OHS Database Builders Listing editor, December 11, 2016. - William Czelusniak continued the firm of Czelusniak et Dugal after the death of Francis E. Dugal. He is the president of the firm. He is the vice-chair of the Organ Historical Society. Sources: William Czelusniak. Czelusniak et Dugal Inc. http://czelusniakdugal.com/about.php, Accessed December 11, 2016.
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