Translation: The progress in flute playing, Op.33.
Translation: Flute. The studies range from Grade 4 to Grade 8 and beyond. 1849-1907. Music Sales America. Classical.
Translation: The studies range from Grade 4 to Grade 8 and beyond. Sheet Music. FLT.
Translation: 12 Intermediate Studies for Solo Flute. Composed by Ernesto K and Ernesto Kohler. 1849-1907.