Https://www.lafbnetwork.com/forum/topic/full-list-of-copyright-support-numbers-in-the-u-s-a-a-complete-travelguidesolutions/#postid-266 https://www.lafbnetwork.com/forum/topic/full-list-of-copyright-support-numbers-in-the-u-s-a-a-complete-travelguidesolutions/#postid-266