Columbia subject headings:
Harvard subject headings:
Secret service--China--History.
Zhongguo guo min dang. Zhong yang zhi xing wei yuan hui. Diao cha tong ji ju--History.
Princeton subject headings:
Secret service--China--History.
Zhongguo guo min dang. Zhong yang zhi xing wei yuan hui. Diao cha tong ji ju--History.