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원본
Etude No. 4 a minor from 13 Estudis Sheet Music by Gheorge Motatu Steurer. Gheorge Motatu Steurer. CLIVIS Publicacions, Barcelona. Piano Solo.
번역
Etude No. 4 a minor from 13 Estudis Sheet Music by Gheorge Motatu Steurer. Gheorge Motatu STEURER. CLIVIS Publicacions, 바르셀로나. 피아노 솔로.