Reference worksSotheby's (London) 5 June 2013, lot 99: GW: Gesamtkatalog der Wiegendrucke. Bd. I [etc.] Stuttgart, etc., 1968- [in progress]. (Vols. 1-7 reproduced with additions and corrections from the original edition (Leipzig, etc., 1925-38)). [See also GW Manuskript - GW M: http://www.gesamtkatalogderwiegendrucke.de] M2352750
Reference worksSotheby's (London) 5 June 2013, lot 99: GW: Gesamtkatalog der Wiegendrucke. Bd. I [etc.] Stuttgart, etc., 1968- [in progress]. (Vols. 1-7 reproduced with additions and corrections from the original edition (Leipzig, etc., 1925-38)). [See also GW Manuskript - GW M: http://www.gesamtkatalogderwiegendrucke.de] M2352750