1. Lithostratigraphy of the Old Red Sandstone successions of the Anglo-Welsh Basin;Barclay,2015
2. 1:625 000 Map Bedrock Geology, UK South;British Geological Survey,2007
3. The early history of the southern margin of the Tywi Anticline in the Carmarthen area, South Wales;Cope,1980
4. The geology of the Llanstephan Peninsula;Cope,1982
5. Cambrian and early Tremadoc rocks of the Llangynog Inlier, Dyfed, South Wales;Cope;Geol. Mag.,1992