I suppose I could/should mention a book about books. "Cerddoriaeth Draddodiadol yng Nghymru: Llyfryddiaeth - Traditional Music in Wales: Bibliography" is bilingual and quite a useful catalogue of main printed collections, research publications and research dissertations dealing with, well ... like it says on the label. I find it useful when I need a bump-start on looking something up.

ISBN: 1-84527-080-0

sian