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found: Candide, p1997: container (Harolyn Blackwell; soprano)
found: Hixon, D.L. Women in music, 1993 (Blackwell, Harolyn; b. 1960, Washington, DC; American soprano)
found: Int. ww in classical mus., 24th ed. (Blackwell, Harolyn; b. 1955, Washington, DC; soprano)