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Are you Ferdinand Sieber, author of the books below?
36 Eight-Measure Vocalises for Baritone, Op. 96 by Ferdinand Sieber 36 Eight-Measure Vocalises, Op. 93 by Ferdinand Sieber 36 Elementary Eight-Measure Vocalises for Tenor, Op. 95 by Ferdinand Sieber 36 Eight-Measure Vocalises for Soprano, Op. 92 by Ferdinand Sieber Kitten on the Keys by Ferdinand Sieber 36 Eight-Measure Vocalises for Elementary Teaching, Opus 94 by Ferdinand Sieber Ten Easy Vocalises and Solfeggios by Ferdinand Sieber Thirty-six Eight-Measure Vocalises for Elementary Teaching by Ferdinand Sieber Ten Easy Vocalises and Solfeggios by Ferdinand Sieber Thirty-six Eight-Measure Vocalises, Op. 95, for Tenor by Ferdinand Sieber


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