Cardiff: University of Wales Press==External links==* Iolo Morganwg and the Romantic Tradition in Wales Project at the Centre for Advanced Welsh and Celtic Studies, University of Wales* The Barddas of Iolo Morganwg, vol.
Y Gyfrol Gyntaf", Cardiff: University of Wales Press (1956)* G J Williams, "Iolo Morganwg a Chywyddau’r Ychwanegiad", Cardiff: University of Wales Press (1926)* Barddas, т.