1. A W.M. 1986 Nature's Place: Conservation Sites and Countryside Change.
2. A M. 1982 A Botanical Survey of Hay Meadows Within the Yorkshire Dales National Park
3. B H.K. 1960 Permanent grassland in England Proceedings of the 8th International Grassland Congress, Reading, 1960
4. B C.J B R.G.H C R.T F R.M F M.T G M.K G G.B H C.J H M H D.C. N M.J. 1993
5. Biological components of Sites of Special Scientific Interest in Wales;B;Biodiversity and Conservation,1996