Sources

Collaer, Paul [et al.]: Südostasien (Musikgeschichte in Bildern 1/3). Unter Mitarbeit von Emmy Bernatzik, Jacques Brunet, Ernst Heins, Mantle Hood, Margaret King, José Maceda, Hans Oesch, Trân vǎn Khê und G. van Wengen. Leipzig, 1979, p.66-67*.

Blench, Roger: The history and distribution of the free-reed mouth-organ in SE Asia (presented at the 14th EurASEAA meeting, Dublin, September 2012 (Draft submitted for proceedings, 2012), p.9 (khene).