Cynhyrchwyd gan yr Asiantaeth Cefn Gwlad = Produced by The Countryside Agency - Nodyn ar dudalen 'Cynnwys' = Note on 'Contents' page.
Arweiniad i barciau cenedlaethol Prydain = A guide to Britain's national parks. Published by Countryside Agency in 2008. Publication and catalogue information, links to buy online and reader comments.