Bekker 1920a
availability: Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) (http://creativecommons.org/licenses/by-nc-sa/4.0/)

Paul Bekker, Frankfurter Konzerte, Frankfurter Zeitung, 64, 405 (Abendblatt), 1 f.