Columbia subject headings:
Anarchism--Brazil--São Paulo (State)--History.
Syndicalism--Brazil--São Paulo (State)--History.
Working class--Brazil--São Paulo (State)--History.
Harvard subject headings:
Anarchism--Brazil--São Paulo (State)--History.
Syndicalism--Brazil--São Paulo (State)--History.
Working class--Brazil--São Paulo (State)--History.
Princeton subject headings:
Anarchism--Brazil--São Paulo (State)--History.
Labor--Brazil--São Paulo (State)--History.
Syndicalism--Brazil--São Paulo (State)--History.