Columbia subject headings:
Harvard subject headings:
Anarchism--Spain--History
Confederacíon Nacional del Trabajo--History.
F. A. I. (Organization : Spain)--History.
Labor movement--Spain--History.
Princeton subject headings:
Anarchism--Spain--History.
Confederacíon Nacional del Trabajo--History.
F.A.I. (Organization : Spain)--History.
Labor movement--Spain--History.