Changes

<ref>[http://www.unc.edu/~unclng/public-d.htm WHEN U.S. WORKS PASS INTO THE PUBLIC DOMAIN.] </ref>

<ref>[http://www.unc.edu/~unclng/public-d.htm WHEN U.S. WORKS PASS INTO THE PUBLIC DOMAIN.] </ref>

Through the ''Berne Convention Implementation Act'', (effective March 1, 1989) copyright is automatic; no registration is needed and it is not necessary to display a © notice to be copyright protected. </ref> [http://www.copyright.gov/help/faq/faq-definitions.html Definitions. U.S. Copyright Office.] </ref>

Through the ''Berne Convention Implementation Act'', (effective March 1, 1989) copyright is automatic; no registration is needed and it is not necessary to display a © notice to be copyright protected. <ref> [http://www.copyright.gov/help/faq/faq-definitions.html Definitions. U.S. Copyright Office.] </ref>