Columbia subject headings:
Harvard subject headings:
Journalism--Germany--Cologne--History--20th century.
Music--Germany--Cologne--20th century--History and criticism.
National socialism and music.
Radio broadcasting--Germany--Cologne--History--20th century.
Princeton subject headings:
Journalism--Germany--Cologne--History--20th century.
Music--Germany--Cologne--20th century--History and criticism.
National socialism and music.
Radio broadcasting--Germany--Cologne--History--20th century.