Columbia subject headings:
Copyright--United States.
Copyright.
Entertainers--Legal status, laws, etc.
Entertainers--Legal status, laws, etc.--United States.
Performing arts--Law and legislation--United States.
Performing arts--Law and legislation.
Harvard subject headings:
Copyright--United States.
Copyright.
Entertainers--Legal status, laws, etc.
Entertainers--Legal status, laws, etc.--United States
Performing arts--Law and legislation
Performing arts--Law and legislation--United States
Princeton subject headings: