Geochemical evidence for atmospheric pollution derived from prehistoric copper mining at Copa hill, Cwmystwyth, mid-Wales. UK

Mighall, T. Abrahams, P. Grattan, J. Hayes, D. Timberlake, S. Forsyth, S. Geochemical evidence for atmospheric pollution derived from prehistoric copper mining at Copa Hill, Cwmystwyth, mid-Wales, UK. The Science of the Total Environment. 2002. 292 pp 69-80

G.W.F.Hegel (1770-1831) : Cyfundrefn, Ysbryd a Hanes

Williams, Howard, G.W.F.Hegel (1770-1831): Cyfundrefn, Ysbryd a Hanes (University of Wales Press, 2005), pp.30-48

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Bryant-Quinn, M. (2006). Waldo Williams: 'Holi'n Hir yn y Tir Tywyll'. In D. Walford Davies and J. Walford Davies(Eds.), Cof ac Arwydd: Ysgrifau Newydd ar Waldo Williams (pp.143-162). Abertawe: Cyhoeddiadau Barddas.