Walker, F. (1930). ‘The Geology of the Shiant Isles (Hebrides)’, extract from the QJGS, v.86,
Walker, F. (1930). ‘The Geology of the Shiant Isles (Hebrides)’, extract from the Quarterly Journal of the Geological Society, v.86, pp.355-398 + foldout colour printed ‘[Geological] Map of the Country About Bridgend (Islay)’, 1:10,560 (37 x 45cm) all slightly age-toned but clean. In very good condition.