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Notes 1. This chart was first published in Peter B. Hirtle, "Recent Changes To The Copyright Law: Copyright Term Extension," Archival Outlook, January/February 1999. This version is current as of .
The Public Domain: Enclosing the Commons of the Mind is licensed under a Creative Commons Attribution-Noncommercial-Share Alike License . If you like it, please consider buying a copy. Why am I allowing you to copy the book for free?