Tui hsiao (-)
Transliteration according to the Wade-Giles transcription system; In Sachs erroneously described as a Doppelschalmei [double-shawm].
Sachs, Curt: Real-Lexikon der Musikinstrumente: zugleich ein Polyglossar für das gesamte Instrumentengebiet [Berlin, 1913]. Hildesheim, 1964 [facsimile].
Moule, Arthur C.: A list of the musical and other sound-producing instruments of the Chinese [Shanghai, 1908, Jl. of the north China branch of the Royal Asiatic Society, 39]. Preface by Harrison Ryker. Buren, 1989 [facsimile], p.97 (Shantung).
Marcuse, Sibyl: Musical instruments: a comprehensive dictionary. New York, 1975 (»Moule).