Schott Spiel Spaß Schule Sopran 2, Method for Soprano Recorder, Volume 2 of the school for soprano recorder, By Gudrun Heyens and Gerhard Engel, Baroque fingering, ISBN 9783795747008, ISMN 9790001190718, publisher's no. ED 21552, Format: 23 x 30.5 cm, 88 Pages, In German