This definitive edition, supervised by Bart˘k scholar Laszlo Somfai, is the first-ever Urtext edition of this work. It takes into account both manuscript and printed sources, as well as letters and notes by the composer in which he recorded matters such as modifications to tempo markings. The Henle edition thus offers a musical text edited to the highest scholarly standards, with fascinating information on the work's compositional history and performance practice. - the publisher