Columbia subject headings:
Harvard subject headings:
China--History--Republic, 1912-1949.
China--Politics and government--1912-1949.
Yan, Xishan, 1883-1960
Princeton subject headings:
China--History--Republic, 1912-1949.
Shanxi Sheng (China)--History--20th century--Biography.
Yan, Xishan, 1883-1960.