The Start of Bohemian Watermark Research in the RISM Working Group in Prague (National Library of the Czech Republic) http://www.rism.info/en/home/newsdetails/article/189/the-start-of-bohemian-watermark-research-in-the-rism-working-group-in-prague-national-library-of-th.html Autor: Klaus Graf Historiker und Archivar, Blogger Alle Beiträge von Klaus Graf anzeigen