- Swedish Antiquarian Booksellers Association (SVAF)
- Danish Antiquarian Booksellers Association (ABF)
- Norwegian Antiquarian Booksellers Association (NAF)
- Finnish Antiquarian Booksellers Association (SAY)
- International League of Antiquarian Booksellers (ILAB/LILA) www. guide
- kb.se - Royal Library - Sweden
- kb.dk - Royal Library - Denmark
- bibsys.no - Norwegian public libraries
- bibliotek.dk - Danish public libraries
- bok.hi.is - Landsbókasafn Íslands - Háskólabókasafn (Iceland National- and University Library)
- viaLibri.net - meta search
