Piano Trio No.1 in B flat,Op.99(D,898) Piano Trio No.1 in B flat, D.898 Piano trio No. 1 in B flat, D898 Piano trio no. 1 in E flat, op. 1, no. 1 Piano trio no. 5 in E flat, op. 70, no. 2 Piano Trio No.1 in E flat,Op.1 No.1 Piano trio No. 1 in E flat op. 1 No. 1 Piano trio no. 6 in B flat, op. 97, "Archduke" Piano trio no. 6 in B flat, op. 97 : "Archduke" Piano Trio No.1 in B flat major,op.21