Columbia subject headings:
Harvard subject headings:
China--History--Ming dynasty, 1368-1644.
China--History--Qing dynasty, 1644-1912.
Gu, Cheng.
Historians--China--Biography
Princeton subject headings:
China--History--Ming dynasty, 1368-1644.
China--History--Qing dynasty, 1644-1912.
Gu, Cheng.
Historians--China--Biography.