Columbia subject headings:
Harvard subject headings:
Sociedade de Instrução e Beneficiência a Voz do Operário (Lisbon, Portugal)--History.
Tobacco workers--Labor unions--Portugal--History.
Princeton subject headings:
Sociedade de Instrução e Beneficiência a Voz do Operário (Lisbon, Portugal)--History.
Tobacco workers--Labor unions--Portugal--History.