Doblinger Musikverlag Klassenmusizierbox Junior: 22 pieces and exercises for making music in class from the 1st grade, by Fritz Höfer, with colored Boomwhacker scores, with notation,lyrics and percussion scores, ISBN 9783902667632, ISMN 9790012205289, DO 09735, 23 x 30,5 cm, 52 pages, incl. download for backing tracks, in German language