Keywords: Maria von Guggenberg–Barska.jpg Maria von Guggenberg “Barska 2012-11-10 13 52 46 Privatarchiv Jana Kaufmann Wettswil/ZĂĽrich author other versions PD-old-70-1923 DEFAULTSORT Guggenberg Barska Maria von 1911 births 1999 deaths Soprano opera vocalists from Austria |