Gruenberg, E. (1919). Violin teaching and violin study rules and hints for teachers and students. Carls Fischer.
Chicago-viite (17. p.)Gruenberg, Eugene. Violin Teaching and Violin Study Rules and Hints for Teachers and Students. New York: Carls Fischer, 1919.
MLA-viite (9. p.)Gruenberg, Eugene. Violin Teaching and Violin Study Rules and Hints for Teachers and Students. Carls Fischer, 1919.
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