On cover: Department of Zoology, National Museum of Wales Amgueddfa Genedlaethol Cymru: 1997.
Cover title.
A survey of Mynydd Preseli SSSI, Pembrokeshire for the freshwater pearl mussel, Margaritifera margaritifera (L., 1758) by Ian J. Killeen. Published by Countryside Council for Wales in 1997. Publication and catalogue information, links to buy online and reader comments.