Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany--History
Bringmann, Fritz.
Concentration camp inmates--Political activity--Germany.
Nazi concentration camp inmates--Germany--Correspondence
Princeton subject headings:
Amicale internationale de Neuengamme--Biography.
Anti-Nazi movement--Germany--Biography.
Arbeitsgemeinschaft Neuengamme--Biography.
Bringmann, Fritz.