Instrumental Duet Bassoon,Instrumental Duet - Level 2 - Digital Download SKU: A0.678875 Composed by John B. Calkin. Arranged by Gert Th. Walter. Children,Christmas. Score and parts. 2 pages. Gert Th. Walter #3563855. Published by Gert Th. Walter (A0.678875). Very easy arrangement, but not only for pupil and beginners.