Columbia subject headings:
Düsseldorf (Germany)--History--20th century--Pictorial works.
Photojournalism--Germany--Düsseldorf--History--20th century.
Retzlaff, Jürgen, 1931-
Harvard subject headings:
Photojournalism--Germany--Düsseldorf--History--20th century.
Photojournalism--Germany--Düsseldorf.
Retzlaff, Jürgen.
Princeton subject headings:
Düsseldorf (Germany)--History--20th century--Pictorial works.
Photojournalism--Germany--Düsseldorf--History--20th century.
Retzlaff, Jürgen, 1931-