Tuba Quartet Euphonium,Tuba - Level 5 - Digital Download SKU: A0.1357961 Composed by Chris Squire and Jon Anderson. Arranged by Tim Olt. Rock. 23 pages. Olt Music #942468. Published by Olt Music (A0.1357961). This Yes classic is arguably the centerpiece of Prog Rock.  Admittedly this version is a bit unusual, but I think Yes would approve.

Tuba quartet (EETT) - Digital Download SKU: CX.TEP11073 Composed by Frank Ferriano. Arranged by Traditional. Score and parts. 19 pages. Published by Tuba-Euphonium Press (CX.TEP11073). Swing Low Sweet Chariot; Sometimes I Feel Like a Motherless Child; Nobody Knows the Trouble I've Seen.