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found: Haydn, J. Mass no. 10 ... [Phonodisc] 1974.
found: Bach, Johann Sebastian. Cantata no. 130, Herr Gott, dich loben alle wir, 1975: label (Helrun Gardow, alto)
found: Bayerisches Musiker Lexikon Online, viewed September 9, 2014 (Gardow, Helrun; born January 8, 1944, Eisenach; mezzo-soprano and music director)