There will be no information about books, articles etc. which are not available on the internet.
There are some items which do not have a link but should have. Unfortunately I do not know where to let them point. So please an email (johannes(dot)heinecke(at)wanadoo(dot)fr) if you know about such pages. But only pages with an linguistic concern on Celtic languages, no music, cookings, paintings, maps etc. which is also very interesting, but this should be only a linguistic resources page.
I would also be very grateful if you could supply me changes of existing pages elsewhere, error corrections etc. concerning this page.