| Composition | Imperii proceres (Isaac, Heinrich) for 4 voices |
| Contributors | Ulrich Alpers, editor |
| Publisher | Ulrich Alpers |
| Languages | — |
| License | Creative Commons Attribution-ShareAlike 4.0 |
| Published | 2017 |
| Edition | — |
| Parts? | No |
| Selections? | No |
| Vocal score? | No |
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