Columbia subject headings:
Agricultural laborers--Labor unions--Netherlands--History--19th century.
Agricultural laborers--Labor unions--Netherlands--History--20th century.
Agricultural laborers--Netherlands--History--19th century.
Agricultural laborers--Netherlands--History--20th century.
Peat workers--Netherlands--History--19th century.
Peat workers--Netherlands--History--20th century.
Harvard subject headings:
Princeton subject headings:
Agricultural laborers--Labor unions--Netherlands--History--19th century.
Agricultural laborers--Labor unions--Netherlands--History--20th century.
Agricultural laborers--Netherlands--History--19th century.
Agricultural laborers--Netherlands--History--20th century.
Peat workers--Netherlands--History--19th century.
Peat workers--Netherlands--History--20th century.