Copyright status of The Wizard of Oz and related works in the United States
"The Wonderful Wizard of Oz" was published in 1900, and was the first to enter the public domain in "1956". This allowed Reilly & Lee, the publisher of all the other Oz books (as well as Baum's other books) to issue their own edition of "The Wizard of Oz", which had previously been published by George M. Hill Company and later by the Bobbs Merill Company after Hill went bankrupt..
Tales of the Wizard of Oz
Tales of the Wizard of Oz is a 1961 animated television series produced by Crawley Films for Videocraft (later known as Rankin/Bass Productions). This is the second animated series produced by the studio, and the first by Rankin/Bass to feature traditional animation.