1. Nesmrtelná píseň / unsterbliche Lied, Das Creator: Marr, Hans Publisher: Bavaria Film GmbH (bis 1945) (München-Geiselgasteig) Format: audiovisual material Type: movie Rights: Creative Commons BY 4.0
2. unsterbliche Lied, Das Creator: Marr, Hans Publisher: Arophon-Film AG (Zürich) and Bavaria Film AG (München-Geiselgasteig) Format: audiovisual material Type: movie Rights: Creative Commons BY 4.0