Columbia subject headings:
Diário dos campos.
Ponta Grossa (Paraná, Brazil)--Intellectual life--20th century.
Ponta Grossa (Paraná, Brazil)--Newspapers--History.
Ponta Grossa (Paraná, Brazil)--Social conditions--20th century.
Harvard subject headings:
Ponta Grossa (Paraná, Brazil)--History--20th century.
Social movements--Brazil--Ponta Grossa (Paraná)--History--20th century.
Princeton subject headings: