Locating a specific German Ph.D. Dissertation from 1959 I am trying to access the following work online, but I'm having no luck finding it:


  Krüger, Dietrich. 1959. "Die Bildersprache des Demosthenes." Ph.D., Classics, Göttingen.


Any idea where I could access it?
In general,


I'd always expect the university library where the dissertation was done to have at least one exemplar in their archives.
The national library is also supposed to have at least one exemplar of every book published in Germany.





For searching books within Germany, the university libraries of several German Länder have a common online catalgoue (Gemeinsamer Verbundkatalog, GVK), see also https://www.bszgbv.de/ which also include Baden-Württemberg and Saarland. 

GVK lists 3 exemplars of the dissertation at the Göttingen University library: https://kxp.k10plus.de/DB=2.1/PPNSET?PPN=146113365
https://www.worldcat.org/ is an online catalogue covering even more libraries from around the globe.