Yr Eglwys yng Nghymru o'r goncwest hyd at y diwygiad Protestannaidd /
Williams, Glanmor
Bassett, T. M.
Caerdydd :  Gwasg Prifysgol Cymru,
1968.
Includes index.
Originally published(B62-15748)1962 as'The Welsh Church from Conquest to Reformation'