Sonata in B flat,D 960 Sonata in B flat,K Sonata in E flat,K Piano sonata in B flat, D.960 Sonata in B flat major, D 960 Sonata in B flat major, D960 Sonata in B flat major,D.960 Sonata in B flat major, D. 960 Sonata in B-flat major D 960 Piano sonata in B flat major, D960