Columbia subject headings:
Harvard subject headings:
Industrial relations--Case studies
Industrial relations--History
Labor market--Case studies.
Labor market--History.
Labor productivity--Korea (South)--History--20th century.
Labor unions--History--19th century.
Strikes and lockouts--History--19th century.
Wages--United States--History--19th century.
Princeton subject headings:
Case studies.
Industrial relations--Case studies.
Industrial relations--History.
Labor market--Case studies.
Labor market--History.