Flute,Instrumental Duet,Violin - Level 3 - Digital Download SKU: A0.530978 Composed by W. Peterson-Berger. Arranged by Klas Krantz. 20th Century,Classical,Romantic Period. 6 pages. Amadeus Music #2027883. Published by Amadeus Music (A0.530978). Wilhelm Peterson-Berger (1867-1942), was a Swedish composer and music critic. As a composer, his main musical influences were Grieg and Wagner as well as Swedish folk idiom.