Originalno: Six Duos, Op. 9. Six Duos, Op. 9 composed by Felix-Jean Prot. Viola sheet music. Edited by Kenneth Martinson. Level 5.
Prevod: Šest Duos, op. 9. Šest Duos, op. 9 v sestavi Felix-Jean Prot. Viola note. Uredil Kenneth Martinson. Za 2 viole.