The Clydach Gorge industrial archaeology trails in the south-east of the Brecon Beacons National Park /
Van Laun, John.
Brecon Beacons National Park Committee.
Gwent (Wales).County Council.
[Brecon] Produced by Brecon Beacons National Park Committee in co-operation with Gwent County Council
1989
Text and illustrations on inside folded cover
Cover title