Columbia subject headings:
Harvard subject headings:
Korea--History--1392-1910.
Korea--Politics and government--1392-1910.
Korea--Social conditions--1392-1910.
Social classes--Korea--History
Social status--Korea--History.
Social structure--Korea--History
Princeton subject headings:
Aristocracy (Social class)--Korea--History.
Korea--History--1392-1637.
Nobility--Korea--History.
Social structure--Korea--History.
Yangban.