The publication date of April 7, 1947 was reported to the U.S. Copyright Office found in the Catalog of Copyright Entries, Third Series, Periodicals, 1946-1947, New Series, Volume 1, Part 2, Numbers 1 & 2 (Incorporating Part 2, Volume 41, 1946, New Series). Copyright registration number B71921. Copyright given to Terry Toons, Inc.