Columbia subject headings:
Harvard subject headings:
Flood control--China--Hai River--Chronology.
Flood control--China--luan River--Chronology.
Hai River (China)--Floods--History--Sources.
Luan River (China)--Floods--History--Sources.
Princeton subject headings:
Floods--China--Hai River--History--Sources.
Floods--China--Luan River--History--Sources.