12 Studies sheet music. Arrangement for Viola, Piano and Guitar. By Peter Racine Fricker, Fernando Sor, Edward MacDowell and Franz Anton Hoffmeister
By Bill Hopkins, Franz G. Seegner and David Liptak, for Piano, Bassoon and Recorder, style Baroque and Classical
By Marco Falaschi and Helmut W. May, for Saxophone and Viola, style Classical
By Fernando Sor, Carl Joachim Andersen and Dionisio Aguado, for Flute and Guitar, style Classical Period
By Henri Jérôme Bertini and Alfred Uhl, for Clarinet and Piano
By Rudolf Schingerlin and Hans-Martin Linde, for Recorder, Viola and Piano
By Novato Music, Danny Crocome and Kenneth Pasciak, for Guitar and Electric guitar, style Latin, Country and Rock