Columbia subject headings:
Homosexuality--Denmark.
Homosexuality--Netherlands.
Homosexuality--United States.
Harvard subject headings:
Gay men
Gay men--Denmark.
Gay men--Netherlands.
Gay men--United States
Homosexuality--Denmark.
Homosexuality--Netherlands
Homosexuality--United States
Homosexuality.
Princeton subject headings:
Homosexuality--Denmark.
Homosexuality--Netherlands.
Homosexuality--United States.