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Browning, Christopher,  Nazi Policy, Jewish Workers, German Killers, Cambridge University Press, 2000. ISBN 0-521-77490-X.

Nix Philip and Jerome Georges The Uniformed Police Forces of the Third Reich 1933-1945, Leandoer & Ekholm, 2006. ISBN 91-975894-3-8

Heiner Lichtenstein: Himmlers grüne Helfer, Bund-Verlag Köln 1990, ISBN 3-7663-2100-5