Sonia Prina (2010-02- – 2010-accessdate-03). Operatic contraltos

Artist Data: Isabelle Urquhart was born 1865-12-09. Isabelle Died: 1907-02-07….

Artist Data: Wikipedia: https://en.wikipedia.org/wiki/Magda_Spiegel

Artist Data: Maria Olszewska was born 1892-08-12. Maria Died: 1969-05-17….

Artist Data: Ada Crossley was born 1874-03-03. Ada Died: 1929-10-17….

Artist Data: Marietta Alboni was born 1826-03-06. Marietta Died: 1894-06-23….