https://katalog.folkwang-uni.de/Record/5-A05512411 Heine, Heinrich:
THE MOST BEAUTIFUL SONG - A Search for Singers with Thomas Quasthoff (Concert) (NTSC). — Hong Kong : Naxos Digital Services US Inc, . — 1 online resource.
(Naxos Video Library)
Naxos Digital Services electronic collection.Streaming video..