https://collection.theatermuseum.at/objekte/alfred-jerger-508511
Alfred Jerger - Online Sammlung - theatermuseum.at
Alfred Jerger, Atelier Willinger, Wien, 31.12.1927, als "Jonny" in "Jonny spielt auf" v. Ernst Krenek, Staatsoper, Wien
alfred jergeronline sammlungtheatermuseum
https://www.encyclopedia.com/arts/dictionaries-thesauruses-pictures-and-press-releases/jerger-alfred-0
Jerger, Alfred | Encyclopedia.com
Jerger, AlfredJerger, Alfred, noted Austrian bass-baritone; b. Brunn, June 9, 1889; d. Vienna, Nov. 18, 1976. He studied at the Vienna Academy of Music, where...
jergeralfredencyclopedia