Columbia subject headings:
Harvard subject headings:
Agriculture, Cooperative--Spain--History.
Collective farms--Spain--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.
Princeton subject headings:
Agriculture, Cooperative--Spain--History.
Collectivization of agriculture--Spain--History.
Peasants--Spain--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.