Columbia subject headings:
Harvard subject headings:
Free ports and zones--China--Hainan Sheng.
Hainan Sheng (China)--Commerce.
Hainan Sheng (China)--Economic policy.
Princeton subject headings:
Free ports and zones--China--Hainan Sheng.
Hainan Sheng (China)--Commerce.
Hainan Sheng (China)--Economic policy.