Columbia subject headings:
Harvard subject headings:
National libraries--Germany--Berlin--History--20th century.
Preussische Staatsbibliothek--History--20th century.
World War, 1939-1945--Libraries.
Princeton subject headings:
National libraries--Germany--Berlin--History--20th century.
Preussische Staatsbibliothek--History--20th century.
Preussische Staatsbibliothek.
World War, 1939-1945--Germany--Berlin.
World War, 1939-1945--Libraries.