Schott 200 Einsing-Übungen für Chöre
Schott 200 Einsing-Übungen Für Chöre, Exercise Book for Choirs, 200 Exercises for choirs and soloists, By Klaus Heizmann, 200 Creative exercises, ISBN: 9783795755997, ISMN: 9790001132411, Publisher's no. ED 9483, 72 Pages, In German language