Columbia subject headings:
Harvard subject headings:
Poor--Brazil--Campinas (São Paulo)--History--19th century.
Slavery--Brazil--Campinas (São Paulo)--History--19th century.
Working class--Brazil--Campinas (São Paulo)--History--19th century.
Princeton subject headings:
Campinas (S~ao Paulo, Brazil)--Social life and customs.
Working class--Brazil--Campinas (S~ao Paulo)--History--19th century.