EN
A catalogue contains the most frequent owner's marks placed in manuscripts and early printed books from restricted collections from University of Warsaw Library. Manuscripts and books were marked with enumerated signatures, supralibros, bookplates, manuscript notes, etc. in advance they were moved to current collection. The aforementioned marks were the main indication of the former collection. Copies of the owner's marks could be used as an aid in the research of old collections by librarians and scholars interested in provenance research.