Preussische Akademie der Wissenschaften.
Prize-winning essays submitted to the Prussian Academy of Sciences, ca. 1936.
Prize-winning essays on the physics of stringed instruments.
Stringed instruments.
Essays. aat ftamc
AIP-ICOS
Archiv der Berlin-Brandenburgische Akademie der Wissenschaften. JgĖerstrasse 22/23, 10117 Berlin