78 Violin-Viola Duets, BI. 33-110 Volume 1 (BI. 33-36) for violin, viola written by Alessandro Rolla. The format of this sheet music is Playing score and it’s published by Gems Music Publications. 78 Violin-Viola Duets, BI. 33-110 Volume 1 (BI. 33-36) is part of the following sheet music categories: Classical.