Piano Trio in B flat,Op.97 'Archduke' Piano trio in B flat, op. 97 : "Archduke" Piano trio in B flat major, op. 97 "archduke" Piano trio No. 7 in B flat op. 97 "archduke" Piano Trio No.6 in B flat,Op.97 "Archduke" Piano Trio No.7 in B flat,Op.97 'Archduke' Piano trio no. 6 in B flat, op. 97, "Archduke" Piano trio in B flat 'Archduke' Piano trio no. 6 in B flat, op. 97 : "Archduke" Piano Trio No. 7 in B flat Op. 97 'Archduke'