ZSCHOKKE, HERMANN*. 2 ALS, 1 CC with note, Vienna, 26 August 1914 6 July 1916 22 June 1918 Box 36, Folder 52
"Zu Biber's Violinsonaten," Zeitschrift der Internationalen Musikgesellschaft , 9, 29-30, (1907-8) Box 4, Folder 10