原文: Sonata quasi un 'Improvisazione'. Ruth Schonthal. Sonata quasi un 'Improvisazione' composed by Ruth Schonthal. Advanced.
译文: 18.2.1965 Festival of American Music, Donell Library, New York, Ruth Schonthal, piano. 露丝Schonthal. 大键琴乐谱. 钢琴独奏乐谱. 先进. 1924 - . 计划.