Ingeborg Danz . Operatic contraltos

Artist Data:
Wikipedia: https://en.wikipedia.org/wiki/Ingeborg_Danz
Artist Data:
Wikipedia: https://en.wikipedia.org/wiki/Ingeborg_Danz
Artist Data: Wikipedia: https://en.wikipedia.org/wiki/List_of_operatic_contraltos
Artist Data: Ortrun Wenkel was born 1986-05-. Ortrun Died: 2015-redirect-….
Artist Data: Ruby Helder was born 1890-03-03. Ruby Died: 1938-11-21….
Artist Data: Hermine Kittel was born 1879-12-02. Hermine Died: 1948-04-07….
Artist Data: Jean Allister was born 1932-02-26. Jean Died: 2012-07-11….
Artist Data: Wikipedia: https://en.wikipedia.org/wiki/Delphine_Galou