DIGITAL Bartók: Sonata for 2 Pia... Aloys Kontarsky, Christoph Caskel, Heinz Konig eAlbum Audio SCOPRI Bartók: Sonata for 2 Pianos and Percussion; Stravinsky: Concerto & Sonata for 2 Pianos Aloys Kontarsky, Christoph Caskel, Heinz Konig SCOPRI