Ruth Siewert
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Ruth Siewert (also Sievert-Schnaudt, Sievert; 1915 in Viersen, Germany – July 2002 in Königsfeld, Germany) was a German contralto and voice teacher.
Ruth Siewert (also Sievert-Schnaudt, Sievert; 1915 in Viersen, Germany – July 2002 in Königsfeld, Germany) was a German contralto and voice teacher.