Gweithredoedd â blaenoriaeth ar gyfer cynllun rheoli 2010-2015 : Parc Cenedlaethol Bannau Brycheiniog = Priority actions for the Brecon Beacons National Park : management plan 2010-2015 by Brecon Beacons National Park Authority. ISBN 9780905293219. Published by Awdurdod Parc Cenedlaethol Bannau Brycheiniog in 2010. Publication and catalogue information, links to buy online and reader comments.