Columbia subject headings:
Copyright--Electronic information resources--United States.
Copyright--Sound recordings--United States.
Copyright--Video recordings--United States.
Digital media--United States.
Fair use (Copyright)--United States.
Harvard subject headings:
Copyright--Electronic information resources--United States.
Copyright--Sound recordings--United States.
Copyright--Video recordings--United States.
Digital media--United States.
Fair use (Copyright)--United States.
Princeton subject headings:
Copyright--Electronic information resources--United States.
Copyright--Sound recordings--United States.
Copyright--Video recordings--United States.
Digital media--United States.
Fair use (Copyright)--United States.