Die Grundlagen der Einsteinschen Relativitäts-Theorie

"Produced by Colonna-Film, Berlin, directed by (Professor) Hanns Walter Kornblum, with the collaboration of Dr. Otto Buek, Prof. Dr. Fanta (Prag), Prof. Dr. Rudolf Laemmel (Zürich), Prof. Dr. G. F. Nicolai. Censured: 30. 3. 1922, 2.045 m, released in March 1922.