Арыгінал: Studies and Pieces for Two Violins, Vol. 4. Eric Keller. Violin sheet music. Violin Duets. For 2 Violins. Text Language. German.
Пераклад: Выдавец выданне Peters. Скрыпка ноты. Studies and Pieces for Two Violins, Vol. 4 composed by Harald Genzmer. Скрыпка Дуэты. Нямецкі.
