Columbia subject headings:
Harvard subject headings:
China--History--Republic, 1912-1949.
China--History--Xi'an Incident, 1936
Generals--China--Biography
Zhang, Xueliang, 1898-
Princeton subject headings:
China--History--Xi'an Incident, 1936.
Generals--China--Biography.
Zhang, Xueliang, 1901-2001.