• Ball, D. F. (1963). The soils and land use of the district around Bangor and Beaumaris. Memoirs of the Soil Survey of Great Britain, H.M.S.O.
  • Bartley, D. D. (1962). Stratigraphy and pollen analysis of lake deposits near Tadcaster, Yorkshire. New Phytol., 61, 277.
  • Clapham, A. R. Tutin, T. G., Warburg, E. F. (1952). Flora of the British Isles. Cambridge University Press. London .
  • Coope, G. R. (1969). Interpretations climatiques des Coleoptercs du ‘Late Weichselian’ dans les lles Britanniques. VIIIe Congres INQUA, Resumes des Communications, Paris 146.
  • Crabtree, K. (1968). Pollen analysis, Sci. Prog., Oxf., 56, 83.
  • Davies, R. E. Bryn (1936). The Ordovician rocks of the Trefrew district (North Wales), Q. Jl geol. Soc. Land., 92, 62.
  • Davis, M. B. & Deevey, E. S. (1964). Pollen accumulation rates: estimates from Late-glacial sediment of Rogers Lake. Science, N.Y., 145, 1293.
  • Deane, R. E. (1950). Pleistocene Geology, Lake Simco district, Ontario. Mem. geol. Surv. Brch Can. 255.
  • De Geer, G. (1940). Geochronologia Sueccica Principles. K. svenska Vetensk Akad. Handl., 18.
  • Faegri, K. & Iversen, J. (1964). Textbook of Pollen Analysis. Blackwell Scientific Publications, Oxford .
  • Godwin, H. (1956). History of the British Flora, Cambridge University Press. London .
  • Iversen, J. (1954). The Late-glacial flora of Denmark and its relation to climate and soil. Danm. Geol. Unders., II, 80, 87.
  • Livingstone, D. A. (1955). Some pollen profiles from Arctic Alaska. Ecology, 36, 587.
  • Moore, P. D. (1970). Studies in the Vegetational History of Mid-Wales. II. The Late-glacial period in Cardiganshire. New Phytol., 69, 363.
  • Oldfield, F. (1960). Studies in the Post-glacial history of British vegetation: Lowland Lonsdale. New Phytol., 59, 192.
  • Pennington, W. (1970). Vegetational history in the north west of England: a regional synthesis. In: Studies in the Vegetational History of the British Isles (Ed. by D.Walker and R. G.West), p. 41. Cambridge University Press. London .
  • Pennington, W. & Bonney, A. P. (1970). Absolute pollen diagram from the British Late-glacial. Nature, Land., 226, 871.
  • Ratcliffe, D. A. (1959). The vegetation of Carneddau, North Wales. I. J. Ecol., 47, 371.
  • Roberts, E. & Roberts, R. H. (1563). Plant notes from south east Caernarvonshire. Proc. bot. Soc. Br. Isl., 5, 105.
  • Seddon, B. (1962). Late-glacial deposits at Llyn Dwythwch and Nant Ffrancon, Caernarvonshire. Phil. Trans. R. Soc. Ser. B, 244, 459.
  • Smith, A. G. (1961). Cannons Lough, Kilrea, Co. Derry: stratigraphy and pollen analysis. Proc. R. Ir. Acad., 61B, 20, 369.
  • Vasari, Y. & Vasari, A. (1968). Late- and Post-glacial macrophytic vegetation in the lochs of Northern Scotland. Acta bot. Fenn., 80.
  • Watts, W. A. (1963) Late-glacial pollen zones in Western Ireland. Ir. Geogr., 4 (5), 367.
  • Williams, H. (1921). The igneous rocks of the Capel Curig district. Proc. Lpool Geol. Soc, 13, 166.