Originál: 60 Etuden, Heft 1. Edited by Gumbert. Published by Friedrich Hofmeister Musikverlag. C. Kopprasch. B-Flat Trumpet sheet music.
Preklad: Vydal Friedrich Hofmeister Musikverlag. B-Flat trumpeta noty. 60 Etuden, Heft 1 v zložení C. Kopprasch. Jeseň. Pre rúrku. Level 3.