Columbia subject headings:
Merchant marine--China--Quanzhou Shi--History.
Quanzhou Shi (China)--History.
Harvard subject headings:
Merchant marine--China--Quanzhou Shi--History.
Quanzhou Shi (China)--History.
Princeton subject headings:
Merchant marine--China--Quanzhou Shi--History.
Quanzhou Shi (China)--History.