1. Interpretation of colour relations in sandstone as a guide to uranium exploration and ore genesis;Adler,1970
2. Petrology, origin and deposition of the higher Lower Old Red Sandstone of Shropshire, England;Allen;J. Sediment. Petrol.,1962
3. Depositional features of Dittonian rocks: Pembrokeshire compared with the Welsh Borderland;Allen;Geol. Mag.,1963
4. Studies in fluviatile sedimentation: six cyclothems from the Lower Old Red Sandstone, Anglo-Welsh Basin;Allen;Sedimentology,1964
5. A review of the origin and characteristics of recent alluvial sediments;Allen;Sedimentology,1965