How a Sausage Dog Works?
How a Sausage Dog Works? (produced by Studio Miniatur Filmowych, directed by Julian Antonisz, 1971)
Julian Antonisz: www.antonisz.pl/
How a Sausage Dog Works? (movie information): pl.wikipedia.org/wiki/Jak_dzia%C5%82a_jamniczek
Who is now entitled to copyright in “old movies”, including cartoons?
M. Mioduszewski, Economic copyrights in film works created before the entry into force of the Act on Copyright and Related Rights, Zeszyty Naukowe UJ, Prace z Prawa Własności Intelektualnej, no. 116/2012 (Polish only)