“Magyar népi hangszerek” [Hungarian Folk Instruments], in Zenei Lexikon [Dictionary of Music], ed. Bence Szabolcsi and Aladár Tóth. Budapest: Győző Andor, 1930–1931. Vol. II, 58–63.
Collected edition: BÖI, 358–365; Essays, 239–284 (a compilation of Bartók’s different essays on the subject), BBI/4, 160–169.
Source: BBA