World – The International Association of Byzantine Studies, http://www.aiebnet.gr/
World – AIEB Bulletin d’Information et de Coordination: http://www.aiebnet.gr/
Wold Catalogue,  http://www.worldcat.org/
World Library, http://worldlibrary.net/
World list of illuminated manuscripts,
http://en.wikipedia.org/wiki/List_of_illuminated_manuscripts
World, more about manuscripts: http://hodegon.nvg.org.au/manu.htm