Columbia subject headings:
Harvard subject headings:
Documentary films--Production and direction--Germany--History.
Journalism--Germany--History.
Journalists--Germany--Biography
Motion picture producers and directors--Germany--Biography
Troeller, Gordian.
Princeton subject headings:
Documentary films--Production and direction--Germany--History.
Journalism--Germany--History.
Journalists--Germany--Biography.
Motion picture producers and directors--Germany--Biography.
Troeller, Gordian.