Columbia subject headings:
Copyright--Royalties--United States.
Copyright--United States.
Interlibrary loans--United States.
Library surveys--United States.
Photocopying services in libraries--United States.
Photocopying--Fair use (Copyright)--United States.
Publishers and publishing--United States.
Harvard subject headings:
Copyright--United States.
Library surveys--United States.
Photocopying services in libraries--United States.
Publishers and publishing--United States.
Princeton subject headings:
Copyright--United States.
Library surveys--United States.
Photocopying services in the libraries--United States.
Publishers and publishing--United States.