Fol (m)
(with) definite article: oair reservoir: flexible (usually of animal skin), ready for the insertion of stocks
Made of goat- or sheepskin, usually with a coloured cloth cover NB¹: ➺ Funda); NB²: ➺ similar terms.
Sachs, Curt: Real-Lexikon der Musikinstrumente: zugleich ein Polyglossar für das gesamte Instrumentengebiet [Berlin, 1913]. Hildesheim, 1964 [facsimile].
Širola, Božidar: Sviraljke s udarnim jezičkom [Aerophones with a beating tongue]. Zagreb, 1937, p.372.