This volume contains the complete works of Bartók for choir a cappella or with piano accompaniment. These works range from four-part male and mixed four- and eight-part choirs to 27 two- and three-part movements for women's and children's choirs. In many pieces Bartók draws on Romanian, Hungarian or Slovak folk songs, in some he uses only folk texts. For some pieces, Bartók placed English or German texts in addition to these. Literal English translations of all of the original texts are given as an appendix, which further contains the first publication of the Two Romanian Folk Songs BB57 from 1909, and also early and foreign language versions of other choir pieces. Besides this, the volume offers a wealth of additional information: The detailed introduction presents the genesis of the works, their publications and reception by the public. The following chapter Notation and Performance provides important information on tempo, phrasing and articulation in these works. The Critical Commentary describes and documents in detail the folk music originals and musical sources for the works. In addition, the continuing consolidation of the musical text up to the final version is meticulously presented; sketches and early versions are also documented.