Columbia subject headings:
Labor movement--India--Chota Nāgpur--History--20th century.
Labor unions--India--Chota Nāgpur--History--20th century.
Harvard subject headings:
Labor movement--India--Chota Nagpur--History--20th century.
Labor movement--India--Chota Nagpur--Political activity.
Labor unions--India--Chota Nagpur--History--20th century.
Labor unions--India--Chota Nagpur--Political activity.
Princeton subject headings:
Labor movement--India--Chota Nagpur--History--20th century.
Labor unions--India--Chota Nagpur--History--20th century.