Columbia subject headings:
Intelligence service--Turkey--History.
Milli İstihbarat Teşkilatı (Turkey)--History.
Secret service--Turkey--History.
Teşkilat-ı Mahsusa (Turkey)--History.
Harvard subject headings:
Intelligence service--Turkey--History.
Milli İstihbarat Teşkilatı (Turkey)--History.
Secret service--Turkey--History.
Teşkilat-ı Mahsusa (Turkey)--History.
Princeton subject headings:
Intelligence service--Turkey--History.
Milli İstihbarat Teşkilatı (Turkey)--History.
Secret service--Turkey--History.
Teşkilat-ı Mahsusa (Turkey)--History.