http://www.whatiscopyright.org/

http://en.wikipedia.org/wiki/Copyright

http://library.findlaw.com/1999/Jan/1/241476.html

http://www.ehow.com/copyright-protection/

http://en.wikipedia.org/wiki/Copyright_protection

http://www.ehow.com/how_2123700_file-copyright-protection-online.html

http://www.ladas.com/Patents/Computer/Copyright.USA.html

http://www.softwareprotection.com/copyright.htm

http://www.copyright.gov/help/faq/faq-duration.html#duration

http://www.copyright.gov/reports/db4.pdf