Columbia subject headings:
Harvard subject headings:
Espionage--Europe--History.
Espionage--Germany--History.
Espionage--Soviet Union--History.
Intelligence service--Germany--History.
Islamic fundamentalism--Europe
Military intelligence--Soviet Union--History.
Terrorism--Religious aspects--Islam
Princeton subject headings:
Espionage--Europe--History--20th century.
Espionage--Germany--History--20th century.
Espionage--Soviet Union--History--20th century.
Islamic fundamentalism--Europe.
Military intelligence--Germany--History--20th century.
Military intelligence--Soviet Union--History--20th century.
Terrorism--Religious aspects--Islam.