U.S. Copyright Office - Welcome From The Register of Copyrights
Copyright Timeline [History of Copyright in the US]
Guide to Copyright for Music Librarians
Copyright and IP - Association of Research Libraries
U.S. Copyright Office, Distance Education Study
Digital Millennium Copyright Act Study and Legislative Information
FNO - Legal Copyright Issues Web Site
When Works Pass Into the Public Domain
10 Big Myths about copyright explained
When Works Pass Into the Public Domain - 2