Columbia subject headings:
Harvard subject headings:
Secret service--China--Biography.
Xu, Enzeng, 1898-
Zhongguo guo min dang. Zhong yang zhi xing wei yuan hui. Diao cha tong ji ju--Anecdotes.
Princeton subject headings:
Secret service--China--Biography.
Xu, Enzeng, 1898-
Zhongguo guo min dang. Zhong yang zhi xing wei yuan hui. Diao cha tong ji ju--Anecdotes.