Daeareg

Boswell, P.G.H.
Middle Silurian rocks of north Wales.
1949.

Bowman, J.E.
Notice of Upper Silurian rocks in the Vale of Llangollen.
Transactions of the Manchester Geological Society, Cyfrol 1, 1841, tudalennau 194 - 211.

Smith, B. & George, T.N.
British regional geology: North Wales.
1948.

Wedd, C.B.
Geology of the country around Wrexham.
rhan 1, 1927, rhan 2 1928.

Wills, L.J.
Geology of the Llangollen district.
1919

Wills, L.J. & Smith, B.
Lower Palaeozoic rocks of the Llangollen district.
Quarterly journal of the Geological Society, Cyfrol 78, rhan 2.