Duhka (f)
According to Muktupāvels, mentioned in Kārlis Kristiāns Ulmanis & G. Bražes, »Latviešu vārdnīca« (Latvian dictionary, 1-2 [1872-1880]), but unfortunately I was unable to check this, because I could not find that source on the internet; NB: ➺ homonym (chanter).
Sachs, Curt: Real-Lexikon der Musikinstrumente: zugleich ein Polyglossar für das gesamte Instrumentengebiet [Berlin, 1913]. Hildesheim, 1964 [facsimile].
Muktupāvels, Valdis: Latviešu mūzikas instrumentu sistemātika [Thesis]. Rīga, 1999, p.36 (»Ulmanis/Bražes).