Changes

Any work published between 1923 and 1977 but published without a copyright notice is in the public domain.

Any work published between 1923 and 1977 but published without a copyright notice is in the public domain.

Any work published between 1978 and 1 March 1, 1989 without a copyright notice and without subsequent registration with the Copyright Office is in the public domain.

Any work published between 1978 and 1 March 1, 1989 without a [[copyright notice]] and without subsequent registration with the Copyright Office is in the public domain.

== Sources ==

== Sources ==