Copyright expiration chart

I was poking around on the New England School of Law website (of all places) and found a link to a very useful chart. This chart, developed by Lolly Gasaway of the University of North Carolina, provides a quick-and-easy reference for dates when works developed at various times enter the public domain. Since that's one of the more common questions I get, I shall make a note of this link in my browser's bookmarks and shall use it often.

Nancy

PS: A colleague, IP/patent attorney Olen York, has pointed me toward a far more complete chart, listing just about every situation in the copyright expiration scenario. Many thanks!