FERDINAND KOBELL Oeuvre Gravée www.polygraphicum.de https://web.archive.org/web/20070824050656/http://www.polygraphicum.de:80/FERDINAND_KOBELL_OEUVRE_CATALOGUE_EXPO_SALE_2007_Index.html

FERDINAND KOBELL Oeuvre Gravée www.polygraphicum.de WEB ARCHIVES https://web.archive.org/web/20070824050656/http://www.polygraphicum.de:80/FERDINAND_KOBELL_OEUVRE_CATALOGUE_EXPO_SALE_2007_Index.html www.polygraphicum.de