Columbia subject headings:
Bohai (Kingdom)--Civilization.
Bohai (Kingdom)--History.
Korea--History--To 935.
Manchuria (China)--History.
Harvard subject headings:
Bohai (Kingdom)--Civilization.
Bohai (Kingdom)--History.
Korea--History--To 935.
Manchuria (China)--History.
Princeton subject headings:
Bohai (Kingdom)--Antiquities.
China--Antiquities.
China--History--Tʻang dynasty, 618-907.