Green, J.F.N. (1923). ‘The Structure of the Bowmore-Portaskaig District to Islay’, extract from the QJGS, v.79
Green, J.F.N. (1923). ‘The Structure of the Bowmore-Portaskaig District to Islay’, extract from the Quarterly Journal of the Geological Society, v.79, pp.72-105 + foldout colour printed ‘[Geological] Map of the Country About Bridgend (Islay)’, 1:31,680 (21 x 50cm) all slightly age-toned but clean. In very good condition.