Columbia subject headings:
Harvard subject headings:
Agricultural laborers--Labor unions--Spain--Catalonia--History.
Agriculture, Cooperative--Spain--Catalonia--History.
Catalonia (Spain)--Rural conditions.
Cooperative societies--Spain--Catalonia--History.
Institut Agrícola Català de Sant Isidre.
Labor unions--Spain--Catalonia--History.
Landowners--Spain--Catalonia--History.
Syndicalism--Spain--Catalonia--History.
Princeton subject headings:
Agricultural laborers--Labor unions--Spain--Catalonia--History.
Agriculture, Cooperative--Spain--Catalonia--History.
Labor unions--Spain--Catalonia--History.
Syndicalism--Spain--Catalonia--History.