Columbia subject headings:
Drainage--France--History--17th century.
Marshes--France--History--17th century.
Reclamation of land--France--History--17th century.
Harvard subject headings:
Agriculture and state--France--History--17th century.
Drainage--History--17th century--Economic aspects--France.
Drainage--History--17th century--Political aspects--France.
Marshes--France--History--17th century.
Princeton subject headings:
Agriculture and state--France--History--17th century.
Drainage--History--17th century--Economic aspects--France.
Drainage--History--17th century--Political aspects--France.
Marshes--France--History--17th century.