Brecon Beacons National Park scenery a geological interpretation /
National Museum of Wales.
Evans, D. Emlyn(David Emlyn),1915-
Brecon Beacons National Park Committee.
Cardiff [The Museum for] the Brecon Beacons National Park Committee
1975
Originally published: Cardiff : National Museum of Wales, 1973
ISBN 0-7200-0091-2
Landforms