Columbia subject headings:
Evidence, Expert.
Obscenity (Law)--Canada.
Obscenity (Law)--United States.
Pornography--Law and legislation--Canada.
Pornography--Law and legislation--United States.
Harvard subject headings:
Evidence, Expert--Canada.
Evidence, Expert--United States.
Pornography--Canada.
Pornography--United States
Trials (Obscenity)--Canada.
Trials (Obscenity)--United States.
Princeton subject headings:
Evidence, Expert.
Obscenity (Law)--Canada.
Obscenity (Law)--United States.
Pornography--Law and legislation--Canada.
Pornography--Law and legislation--United States.