Columbia subject headings:
Harvard subject headings:
Anarchism--Spain--Catalonia--History--20th century.
Labor unions--Spain--Catalonia--History--20th century.
Seguí i Rubinat, Salvador, 1887-1923--Political and social views.
Seguí i Rubinat, Salvador, 1887-1923.
Spain--Politics and government--1886-1931.
Syndicalism--Spain--Catalonia--History--20th century.
Princeton subject headings:
Anarchism--Spain--Catalonia--History--20th century.
Labor unions--Spain--Catalonia--History--20th century.
Seguí i Rubinat, Salvador, 1887-1923.
Spain--Politics and government--1886-1931.
Syndicalism--Spain--Catalonia--History--20th century.