Yo-Yo Ma - Soul of the Tango - The Music of Astor Piazzolla

Yo-Yo Ma - Soul of the Tango - The Music of Astor Piazzolla, Box: 13, Folder: 41. Personal papers of Janet Hamburg, PP 516. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/138798 Accessed December 25, 2025.