I saw that; am now looking to track down the details of the 1972 case against Dunnahoo/Thunderbird. Found a textbook, "Piracy in the Motion Picture Industry" by Kerry Segrave, that mentions it in Chapter 4; I can't see the Chap 4 notes at the end in my Google Books viewer. https://books.google.com/books?id=zcKSCgAAQBAJ&q=Thunderbird#v=snippet&q=thunderbird&f=false