Columbia subject headings:
Copyright and electronic data processing--United States--Bibliography.
Copyright and electronic data processing--United States.
Photocopying--Fair use (Copyright)--United States--Bibliography.
Photocopying--Fair use (Copyright)--United States.
Harvard subject headings:
Copyright and electronic data processing--United States
Photocopying--Fair use (Copyright)--United States
Photocopying--Fair use (Copyright)--United States--Bibliography.
Princeton subject headings: