Columbia subject headings:
Harvard subject headings:
Agricultural instruments--France--Aisne--History--20th century--Exhibitions.
Aisne (France)--Rural conditions--Exhibitions.
Reconstruction (1914-1939)--France--Aisne--Exhibitions.
Princeton subject headings:
Agricultural instruments--France--Aisne--History--20th century--Exhibitions.
Aisne (France)--Rural conditions--Exhibitions.
Reconstruction (1914-1939)--France--Aisne--Exhibitions.