Piano Quartet in E flat,K 493 Piano quartet in E flat, op. 47 Piano Quartet in E flat,Op.47 Piano quartet in E flat major, KV 493 Piano Quartet in E flat Op.47 Piano quintet in E flat, op. 44 piano quartet in a major,op.26 Piano quartet in E flat major op.44 Piano quartet in E flat major op.47 piano quartet nos.1 and 3