Söhn,G.
Handbuch der Original-Graphik in deutschen Zeitschriften, Mappenwerken, Kunstbüchern und Katalogen (HDO) 1890-1933. 7 vols. Düsseldorf, Edition GS 1989-98. 4°. With numerous ills. Olwdbde. with OU. - One of 650 resp. 450 copies - vol. 7 contains the index as appendix.