"01-27" . "Soprano. - Mezzo-soprano"@fr . . . "Berta Morena (1878-1952)"@fr . "Duett aus \"Aida\" [Enregistrement sonore] / Fritz Feinhals ; Berta Morena ; mit Orchesterbegl... [et al.]. Gramophone Monarch 044134. - . - LC authorities. - http://authorities.loc.gov. - 2008-01-09"@fr . "1878"^^ . . . "1878-01-27" . "Mannheim (Allemagne)" . . . . "ISNI" . . . "Morena" . . . . . . "1952"^^ . "Berta" . "2015-03-12"^^ . . "0000000038161273" . . "1952-10-07" . "2008-01-09" . . "Rottach-Egern (Allemagne)" . . "female" . . . "Mannheim (Allemagne)" . "Berta Meyer (1878-1952)"@fr . "Soprano. - Mezzo-soprano" . . . . "2022-05-03" . "15593713"^^ . "Berta Morena" . . . "Soprano. - Mezzo-soprano" . . "Bertha Morena (1878-1952)"@fr . "Rottach-Egern (Allemagne)" .