popsike.com - BACKHAUS Beethoven 32 Piano Sonatas 10-LP-Box DECCA - auction details
Le sonate per pianoforte: The Mono Recordings (1950-54) by Wilhelm Backhaus (Compilation; Decca): Reviews, Ratings, Credits, Song list - Rate Your Music
Beethoven - Wilhelm Backhaus – Sonata No. 30 In E Major (Op. 109), Sonata No. 32 In C Minor (Op. 111) (Vinyl) - Discogs
Ludwig van Beethoven, Wilhelm Backhaus - Wilhelm Backhaus ~ Beethoven - The Piano Sonatas - Amazon.com Music