ماخذ: Bartok for Thursday Evenings, for 2 violins & viola. Waltz. Bela Bartok. Viola sheet music. Violin sheet music. Beginning. 1881-1945.
ترجمه: بلا بارتوک. صفحه موسیقی ویولا. نت ویولن. شروع. Bartok for Thursday Evenings, for 2 violins & viola composed by Bela Bartok. 20 قرن، کارنامه.