Sonata in B flat,K 378,317d Sonata in B flat,K 333,315c Sonata in E flat,K 380,374f Sonata in B flat, KV 378 Sonata in B flat,K 31 Sonata in B flat,K.378 Sonata in E flat,K 302,293b Sonata in E flat,K 481 Sonata in B-flat,K.378 Sonata in B flat, K.281