1. Nekton;Aleyev,1976
2. Old Red Sandstone facies in external basins, with particular reference to southern Britain;Allen,1979
3. The succession of the Lower Old Red Sandstone (Siluro-Devonian) along the Ross-Tewkesbury Spur Motorway (M.50);Allen,1976
4. The Downtonian and Dittonian facies of the Welsh Borderland;Allen;Geol. Mag.,1963
5. Old Red Sandstone Basins of North America and Northwest Europe;Allen,1967