Columbia subject headings:
Harvard subject headings:
Tanggu Qu (Tianjin, China)--History.
Princeton subject headings:
Tanggu qu (Tianjin, China)--History--19th century.
Tanggu qu (Tianjin, China)--History--20th century.
Tianjin (China)--History--19th century.
Tianjin (China)--History--20th century.