Fair Use: What Copyrighted Works Can We Use?
http://www.stc.org/ConfProceed/1993/PDFs/Pg9193.pdf

Helyar, Pamela S.
STC Proceedings
1993

Abstract:

Copyright laws permit us to make fair use of copyrighted works. We can reproduce and use copyrighted works if our uses benefit the public and if they will not adversely affect potential markets for the works. Generally, we can use copyrighted works for purposes such as the following: criticism, comment, news reporting teaching scholarship, or research. However we cannot unfairly make a profit from the use. Further, we cannot use more than a small portion of an entire work.