This critical restoration of Béla Bartók’s Viola Concerto made by the Hungarian violist Csaba Erdélyi represents a major contribution to Bartók scholarship, and has revived international interest in an important work by one of the greatest composers of the twentieth century. This edition is intended to serve as a basis for practical performance, and a critical apparatus is supplied so that comparison may be made with the work as it appeared in the composer’s draft manuscript. The viola part is presented in two versions in the same folio; the first including Erdélyi’s fingerings and bowings, and the second including only suggestions for dynamics and tempi, in order to provide a clean copy for the player’s personal interpretation.