Columbia subject headings:
Protest movements--Spain--History--21st century.
Social movements--Spain--History--21st century.
Spain--Politics and government--21st century.
Spain--Social conditions--21st century.
Harvard subject headings:
Protest movements--Spain--History--21st century.
Social movements--Spain--History--21st century.
Spain--Politics and government--21st century
Spain--Social conditions--21st century.
Princeton subject headings:
Protest movements--Spain--History--21st century.
Social movements--Spain--History--21st century.
Spain--Politics and government--21st century.
Spain--Social conditions--21st century.