Columbia subject headings:
Harvard subject headings:
Pornography--Social aspects--Washington (D.C.)
Prostitution--Washington (D.C.)
Sex-oriented businesses--Washington (D.C.)
Washington (D.C.)--Moral conditions.
Princeton subject headings:
Pornography--Social aspects--Washington (D.C.).
Prostitution--Washington (D.C.).
Sex industry--Washington (D.C.).
Washington (D.C.)--Moral conditions.