Nm 62 op. 57 / 1991 Froh
Frohlich, Martha: Beethoven's "Appassionata" sonata / Martha Frohlich. – Oxford : Clarendon Press, 1991. – VIII, 204 S. : Faks. (Noten), Notenbeisp. – (Studies in musical genesis and structure)
ISBN/ISMN 0-19-816189-1
Inv.-Nr. 92.011
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