Columbia subject headings:
Copyright--United States--Periodicals.
Patent laws and legislation--United States--Periodicals.
Trademarks--United States--Periodicals.
Harvard subject headings:
Copyright--United States--Periodicals.
Intellectual property--United States--Periodicals.
Patent laws and legislation--United States--Periodicals.
Trademarks--Law and legislation--United States--Periodicals
Princeton subject headings:
Copyright--United States--Periodicals.
Patent laws and legislation--United States--Periodicals.
Periodicals.
Trademarks--United States--Periodicals.