With the Gesamtkatalog der europäischen Aufnahmen 1904–1932 für das Welte-Mignon Reproduktionspiano (complete catalog of the European recordings 1904–1932 for the Welte-Mignon reproducing piano), Gerhard Dangel and Hans W. Schmitz have written an impressive work. In addition to detailed information on the music rolls, it contains many background details on music roll production. Since Welte never had a complete catalog of all its rolls, this work is all the more valuable – not only for collectors, but also for anyone interested in Welte’s reproducing titles