The by Hungarian composer Gyula Dávid is not currently available in the public domain on IMSLP due to copyright restrictions (the composer passed away in 1977). Since you are preparing the piece, 1. Where to Find the Score
Gyula David (1915-1978) was a Hungarian composer, violist, and music educator. Although not as well-known as some of his contemporaries, David was a prolific composer who created a diverse range of works, including symphonies, chamber music, and concertos. His music often featured a unique blend of traditional Hungarian folk elements and modernist techniques. Gyula David Viola Concerto Imslp
If you need the music for performance or study, you must obtain it through official commercial channels: Publisher: The concerto is published by Editio Musica Budapest (EMB) Purchasing Options: Sheet Music Retailers: Viola Concerto (1951) The by Hungarian composer Gyula
Under most international copyright laws (Life + 50 or Life + 70 years), his works are . Although not as well-known as some of his
