Columbia subject headings:
Harvard subject headings:
Espionage, Chinese--China--Shanghai.
Espionage, Communist--China--Shanghai.
Shanghai (China)--History
Sino-Japanese War, 1937-1945--Secret service--China--Shanghai.
Princeton subject headings:
Espionage, Chinese--China--Shanghai.
Espionage, Communist--China--Shanghai.
Shanghai (China)--History.
Sino-Japanese War, 1937-1945--Secret service--China--Shanghai.