Part of Caryl and Herbert Roese Papers
'A study of the prehistoric sepulchral and related monuments in the Brecon Beacons National Park of South Wales', dissertation submitted in part fulfilment for the degree of BSc (Cardiff University, 1976).
Part of Campaign for the Protection of Rural Wales (CPRW) records
The file includes information regarding the designation of the Brecon Beacons as a national park, proposed nuclear power stations at Trawsfynydd and Edern, Liverpool Corporation water scheme in Cwm Tryweryn and the Clywedog reservoir.