1. Petrology, origin and deposition of the highest Lower Old Red Sandstone of Shropshire, England;Allen;J. Sediment. Petrol.,1962
2. Depositional features of Dittonian rocks: Pembrokeshire compared with the Welsh Borderland;Ball;Geol. Mag,1963
3. The Downtonian and Dittonian facies of the Welsh Borderland;Ball;Geol. Mag.,1963
4. Bailey , R. J. 1962 Sedimentation and facies change in the Ludlovian of south Central Wales and the adjacent Borderland
5. A Ludlovian facies boundary in south Central Wales;Ball;Geol. J.,1964