Columbia subject headings:
Harvard subject headings:
Mao, Zedong, 1893-1976
Yan'an (Shaanxi Sheng, China)--Politics and government.
Zhongguo gong chan dang--Purges--History.
Princeton subject headings:
Mao, Zedong, 1893-1976.
Zhongguo gong chan dang--Purges--History.