Columbia subject headings:
Anarchism--Spain--History.
Collective farms--Spain--History.
Collectivism--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.
Harvard subject headings:
Anarchism--Spain--History
Collective farms--Spain--History.
Collectivism--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.
Princeton subject headings: