1. The relief and drainage of Wales;Brown,1960
2. Clarke, B. B. The Cretaceous geomorphology of the Black Mountains Proc. Birmingham nat. Hist. & phil. Soc.16, 155–172.
3. The denudation chronology of the Vale of Glamorgan;Driscoll;Trans. Inst. Brit. Geogr.,1958
4. Shoreline evolution in the Swansea district;George;Proc. Swansea sci. & field Nat. Soc.,1938
5. The development of the Towy and upper Usk drainage pattern;George;Quart. J. geol. Soc. Lond.,1942