Columbia subject headings:
Harvard subject headings:
AIDS (Disease)--Portugal.
Prostitutes--Diseases--Portugal.
Prostitutes--Health and hygiene--Portugal--History.
Prostitutes--Portugal--Social conditions.
Prostitution--Portugal--History.
Princeton subject headings:
AIDS (Disease)--Brazil--Belém.
AIDS (Disease)--Portugal--Lisbon.
Prostitution--Brazil--Belém.
Prostitution--Portugal--Lisbon.