On the Igneous and Associated Sedimentary Rocks of Liangynog (Caermarthenshire)

T. C. Cantrill, H. H. Thomas
1906 Quarterly Journal of the Geological Society  
doi:10.1144/gsl.jgs.1906.062.01-04.13 fatcat:3jumwficqvavdg43yn3nmmlxay