Per tuba ad astra Studies for tuba ; medium ; op. 139 = Übungen für Tuba ; mittelschwer ; op. 139 = Etudes pour tuba ; intermédiaire ; op. 139 - Bourgeois, Derek 1941-2017 (Brass Wind Publications, 1995)
"Grade--medium.
Biographical sketch of the composer on p. [12]
Keywords: Tuba / Studies and exercises; Tuba; Studies (Music); Studies and exercises; Études (Musique)