Sonata in B flat,K 281,189f Sonata in E flat,K 282,189g Sonata in E flat,K 380,374f Sonata in B flat major, K281/189f Sonata in B flat,KV 281 Sonata in E flat,K 481 Sonata in B flat, K.281 Sonata in B flat, KV 378 Sonata in B flat,K 10 Sonata in B flat,K 15