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Biography
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Sonja Knittel
Austrian operatic soprano.
Born 11 April 1925, 1923 or 1926 in Vienna, Austria and died 23 February 2017 in Oberasbach, Germany.
Born 11 April 1925, 1923 or 1926 in Vienna, Austria and died 23 February 2017 in Oberasbach, Germany.