Columbia subject headings:
Arquivo de História Social "Edgard Leuenroth"--Catalogs.
Brazil--History--Sources--Bibliography--Catalogs.
Harvard subject headings:
Arquivo de História Social "Edgard Leuenroth"--Catalogs.
Brazil--History--Sources--Bibliography--Catalogs.
Brazil--Social conditions--Bibliography--Catalogs.
Working class--Brazil--Bibliography--Catalogs.
Princeton subject headings:
Archives--Brazil--São Paulo.
Arquivo de História Social "Edgard Leuenroth"
Labor movement--Brazil--History--Sources.
Labor unions--Brazil--History--Sources.
Labor--Brazil--History--Sources.