Columbia subject headings:
Authors and publishers--United States.
Authors--Legal status, laws, etc.--United States.
Copyright--United States.
Harvard subject headings:
Authors and publishers--United States.
Authors--Legal status, laws, etc.--United States.
Copyright--United States.
Princeton subject headings:
Authors and publishers--United States.
Authors--Legal status, laws, etc.--United States.
Copyright--United States.