Templat:R:cy:GPC
R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editor (1950–present), “R:cy:GPC”, dalam Geiriadur Prifysgol Cymru Online, University of Wales Centre for Advanced Welsh & Celtic Studies
R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editor (1950–present), “R:cy:GPC”, dalam Geiriadur Prifysgol Cymru Online, University of Wales Centre for Advanced Welsh & Celtic Studies