Columbia subject headings:
Harvard subject headings:
Police--Germany--History--20th century--Sources.
Waffen-SS--Sources.
World War, 1939-1945--Germany--Sources.
Princeton subject headings:
Nationalsozialistische Deutsche Arbeiter-Partei. Hauptamt Ordnungspolizei--History.
Waffen-SS--History.
World War, 1939-1945--Campaigns--Europe.