1. A study of the dissolved and particulate trace elements in the Bristol Channel;Abdullah;J. Mar. Biol. Assoc. U.K.,1974
2. Distribution of the Elements in our Planet;Ahrens,1965
3. The concealed rock-surface and overlying deposits of the Severn Valley and Estuary from Upton to Neath;Anderson,1968
4. The concealed rock-surface and overlying deposits of the Severn Valley and Estuary from Upton to Neath;Anderson,1971
5. Distribution of the Elements in our Planet;Ahrens,1974