Columbia subject headings:
France--History--Revolution, 1789-1799--Bibliography.
Picardy (France)--History--Bibliography.
Harvard subject headings:
France--History--Revolution, 1789-1799--Bibliography.
France--History--Revolution, 1789-1799--Sources.
Picardy (France)--Bibliography.
Picardy (France)--History--Sources.
Princeton subject headings:
France--History--Revolution, 1789-1799--Sources.
Picardy (France)--History--18th century--Sources.