Koch, Ludwig, and Edward Nicholson. 1937. “More Songs Of Wild Birds”. London: The Parlophone Co Ltd.

Reich, Karl. 1913. Camden, NJ: Victor talking machine co. .

Reich, Karl. 1913. Camden, NJ: Victor talking machine co.

n.d. “Tubatalabal Recording”. Smithsonian Institution. https://naturalhistory2.si.edu/anthropology/media/NMNH-sinaa_00001258.mp3.

Heck, Lutz. 1932. Schrei Der Steppe. München: Knorr & Hirth.

n.d. “Whispered Vowels: Experimental Cylinder From The Berliner Phonogramm-Archiv”. Phonogramm Arch iv.

Schwitters, Kurt, and Süddeutscher Rundfunk. 1932. “70 Jahre Sdr”. Ein Streifzug Durch 70 Jahre Radio-Programm. Süddeutscher Rundfunk.

RRG, Reichs-Rundfunk-Gesellschaft, Gertrud Storm, and Friedrich Karl Roedemeyer. 1932. “Dra-Sammelband”. Südwestfunk.

Koch, Ludwig, and Edward Nicholson. 1936. “Songs Of Wild Birds. Two Discs”. London: The Parlophone Co Ltd.

Koch, Ludwig, and Edward Nicholson. 1936. “Songs Of Wild Birds. Two Discs”. London: The Parlophone Co Ltd.