Sonata in B flat,K 570 Sonata in B flat,KV 570 Sonata in B flat, K.570 Sonata in B flat,D 960 Sonata in B flat,K 10 Sonata in B flat, KV 378 Sonata in E flat, KV 380 Sonata in E flat,BWV 525 Sonata in B flat,K 15 Sonata in B flat,K 31