1. Trace element content of soils affected by base metal mining in Wales;Alloway;Geoderma,1971
2. Ambert, P. Barge, H. Bourhis, J.-R. Esperou, J.-L. Houles, N. Solari, M. E. 1990, Cabrieres-Herault. Le plus vieux centre minier metallurgique de France (2500 av. J.-C.)
3. A practical pollen guide to the British Flora;Andrew,1984
4. Dressing floors on the Kingside lode, Copa Hill, Cwmystwyth;Armfield;Archaeology in Wales,1989
5. History of vegetation;Barber,1976