Columbia subject headings:
Harvard subject headings:
Communism--China--Xi'an (Shaanxi Sheng)--History--Sources.
Xi'an (Shaanxi Sheng, China)--History--Sources.
Princeton subject headings:
Communism--China--Xi'an (Shaanxi Sheng)--History--Sources.
Xi'an (Shaanxi Sheng, China)--History--Sources.