Bernina-Verlag (later Delphi-Verlag)
As the situation in Germany worsened, Paul Aretz relocated his publishing activities to Austria and Switzerland in 1934, renaming his former Paul Aretz Verlag to Bernina Verlag.
In 1937, he concentrated on his Swiss branch. His German publishing house in Dresden, which he had founded in 1921, was aryanized by Gottfried Linsmayer. He had published popular biographies and erotica.
In 1938 he changed the name again: Delphi-Verlag. The business was relocated to Bern later on. Publishing activity can be confirmed until 1948.
- Fischer, Ernst: Verleger, Buchhaendler und Antiquare aus Deutschland und Oesterreich in der Emigration nach 1933: ein biographisches Handbuch / von Ernst Fischer. - Stuttgart : Verband K54Deutscher Antiquare, 2011