1. Cornstone;Allen;Geol. Mag.,1960
2. The Highest Lower Old Red Sandstone of Brown Clee Hill, Shropshire;Allen;Proc. Geol. Ass., Lond.,1961
3. Intraformational Conglomerates and Scoured Surfaces in the Lower Old Red Sandstone of the Anglo-Welsh Cuvette;Allen;Liverpool and Manchester Geological Journal,1962
4. The Old Red Sandstone of Brown Clee Hill and the Adjacent Area;Ball;Bull. Brit. Mus. (nat. Hist.),1961
5. Caliche in South-Eastern New Mexico;Bretz;J. Geol.,1949