Columbia subject headings:
Harvard subject headings:
China--History--221 B.C.-960 A.D.--Errors, inventions, etc.--Indexes.
China--History--Warring States, 403 B.C.-221 B.C.--Errors, inventions, etc.--Indexes.
Yan, Yan, 1574 or 1575-1645. Zi zhi tong jian bu--Indexes.
Yan, Yan, 1574 or 1575-1645. Zi zhi tong jian bu.
Princeton subject headings:
China--History--221 B.C.-960 A.D.--Errors, inventions, etc.--Indexes.
China--History--Warring States, 403-221 B.C.--Errors, inventions, etc.--Indexes.
Yan, Yan, 1574 or 1575-1645. Zi zhi tong jian bu--Indexes.
Yan, Yan, 1574 or 1575-1645. Zi zhi tong jian bu.