Columbia subject headings:
Condom use--Mexico--Toluca de Lerdo.
Prostitutes--Mexico--Toluca de Lerdo--Attitudes.
Prostitution--Mexico--Toluca de Lerdo.
Harvard subject headings:
Condom use--Mexico--Toluca de Lerdo.
Prostitutes--Mexico--Toluca de Lerdo--Attitudes.
Prostitution--Mexico--Toluca de Lerdo.
Princeton subject headings:
Condom use--Mexico--Toluca de Lerdo.
Prostitutes--Mexico--Toluca de Lerdo--Attitudes.
Prostitution--Mexico--Toluca de Lerdo.