TOLLEY'S TAX PLANNING 1988; ed. by Glyn Saunders, Robert Wareham Deborah HicksGlyn Saunders1988PDF30 MBEN
Cofiant y parchedig David Roberts, Wrexham, gan y Parch. David Griffith, Bethel.Griffith, David, of Felinheli.1899CY
Cofiant y Parch.John Evans Eglwysbach (yn cynwys ei "Adgofion"). Gan John Price Roberts, Wrexham,a Thomas Hughes,Lerpwl.John Price. Roberts1903CY
Dychymyg. Y bryddest fuddugol yn Eisteddfod Goronog Llanarth,Ceredigion,Gorphenaf,1875. Gan David Roberts,Wrexham, (Dewi Ogwen).Roberts, David, Bryn Pyll.1877CY