Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
The Bird Seller by Zeller, Ħad 27 Jan 2013, Minn (2012/2013), Immexxi minn Ansgar Weigner,, Surmast Direttur Benjamin Schneider, Wolfgang Wengenroth, Grosses Haus (Wiesbaden), Wiesbaden, Germany