- Ferdinand J. de Hen
End-blown flute of the Sere people of the Democratic Republic of the Congo. It is made of a conical animal horn and has three or more fingerholes. A flute with four fingerholes is called se.F.J. de Hen: Beitrag zur Kenntnis der Musikinstrumente aus Belgisch Kongo und Ruanda-Urundi (Tervuren, 1960), 194–6....