Heinrichshofen's Verlag Die große Folksong-Collection, Songbook for Recorder, 55 Folk songs, Arranged for recorder quartet (SATB), Edited by Willibald Lutz, In standard notation, Level of difficulty: Easy to medium, ISMN 979-0-2045-4700-5, publisher no. N 4700, Format: DIN A4, 60 Pages