Columbia subject headings:
Harvard subject headings:
Haikou (Hainan Sheng, China)--Census, 1990.
Haikou (Hainan Sheng, China)--Population--Statistics.
Princeton subject headings:
Haikou (Hainan Sheng, China)--Census, 1990.
Haikou (Hainan Sheng, China)--Population--Statistics.