Encyclopaedia Iranica. Balaban.Archived 2011-08-05 at the Wayback Machine: «BĀLĀBĀN, a cylindrical-bore, double-reed wind instrument about 35cm long with seven finger holes and one thumb hole. It is played in eastern Azerbaijan in Iran and Soviet Azerbaijan (where it is also called düdük).»
Encyclopaedia Iranica. Balaban.Archived 2011-08-05 at the Wayback Machine: «BĀLĀBĀN, a cylindrical-bore, double-reed wind instrument about 35cm long with seven finger holes and one thumb hole. It is played in eastern Azerbaijan in Iran and Soviet Azerbaijan (where it is also called düdük).»