1. The graptolite biostratigraphy of a Llandovery outlier near Llanystumdwy, Gwynedd, North Wales;Baker;Geol. Mag.,1981
2. Sedimentary environments of the basinal Llandovery of mid-Wales;Cave;Geol. Soc. London Spec. Publ.,1979
3. Elemental distributions and neodymium isotopic compositions of Silurian metasediments, western Maine, USA: redistribution of the rare earth elements;Cullers;Geochem. Cosmochim. Acta,1997
4. Davies, J.R. , Fletcher, C.J.N. , Waters, R.A. , Wilson, D. , Woodhall, D.G. and Zalasiewicz, J.A. (1997) Geology of the country around Llanilar and Rhayader. Memoir for 1:50,000 Geological Sheets 178 and 179 (England and Wales), The Stationery Office, London.
5. Zircon growth in slate;Dempster;Geology,2004