(31 Duets That Can Be Played by Any Combination of String Instruments). By Larry Clark. Edited by Doris Gazda. Arranged by Larry Clark. For viola. Compatible Duets for Strings. Part book (softcover). 48 pages. Published by Carl Fischer

Viola. Arranged by William Ryden. Duet or Duo; Mixed Instruments - Flexible Instrumentation; Solo Small Ensembles. Sacred Instrumental Ensembles for All. Sacred. Book. 24 pages. Alfred Music #00-EL9789. Published by Alfred Music